1/50
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced |
|---|
No study sessions yet.
Introduction
The nervous system is a complex network of nerve cells that enables all parts of the body to function.
Includes:
Brain
Spinal cord
Nerves and nerve fibers
The nervous system is well protected.
The brain is protected by the skull.
The spinal cord is protected by the spinal canal.
Despite this protection, serious injuries can damage the nervous system.
ok?
ok
Anatomy and Physiology
The nervous system is divided into two anatomic parts.
— nervous system
— nervous system
central peripheral
Central Nervous System
Includes the — and — —
The brain controls the body and is the center of consciousness.
Brain is divided into three major areas:
—
—
—
Cerebrum
Controls a wide variety of activities, including most voluntary — function and — thought
Contains about 75% of the brain’s total volume
Divided into — hemispheres with — lobes
Cerebellum
Coordinates — and — movements
Brainstem
Controls most functions necessary for —
Best —- part of the CNS
brain spinal cord
cerebrum, cerebellum, brainstem
motor, conscious, two four
balance body
life, protected
Central Nervous System
Spinal cord
Made up of fibers that extend from the brain’s — cells
Carries messages between the brain and the body via the grey and white matter of the spinal cord
Protective coverings
The entire CNS is contained within a protective framework.
The thick, bony structures of the skull and spinal canal withstand injury very well.
The CNS is further protected by the —-.
Meninges
Outer layer (dura mater) is a tough, fibrous layer that forms a sac to contain the CNS.
Inner two layers (arachnoid mater and pia mater) contain the —- —-.
Cerebrospinal fluid (CSF)
Produced in a chamber inside the brain called the — —
Approximately 125 to 150 mL of CSF in the brain at any time
Primarily acts as a — —
nerve
meninges
blood vessels
third ventricle, shock absorber
Peripheral Nervous System
31 pairs of spinal nerves
Conduct impulses from the — and other — to the spinal cord
Conduct — impulses from the spinal cord to the —
12 pairs of cranial nerves
Transmit information —- to or from the brain
Perform special functions in the head and face, including sight, smell, taste, hearing, and facial expressions
Two types of peripheral nerves
Sensory nerves
Carry only — type of information from the —- to the —- via the spinal cord
Motor nerves
One for each —-
Carry information from the — to the —-
Connecting nerves
Found only in the — and — —
— the sensory and motor nerves with short fibers
Allow the — of simple messages
skin organs, motor, muscles, directly, one, body, brain, muscle, brain muscles
brain spinal cord, connect, exchange
How the Nervous System Works
Controls virtually all the body’s activities, including:
— activities
— activities
— activities
Connecting nerves in the spinal cord form a — —.
If a sensory nerve in this arc detects an irritating stimulus, it —- the brain and sends the message directly to a —- nerve.
Voluntary activities are activities we consciously perform.
Involuntary activities are the actions that are not under conscious control.
Somatic (voluntary) nervous system handles —- activities.
Autonomic (involuntary) nervous system handles — —.
Divided into two sections: — and — nervous systems
Sympathetic nervous system reacts to — with a — — — response.
Parasympathetic nervous system has the opposite effect on the body.
reflex, voluntary involuntary
reflex arc, bypasses, motor
voluntary, body functions, sympathetic parasympathetic
stress, fight or flight
Skeletal System
Skull
Composed of two groups of bones: —- and —- bones.
The brain connects to the spinal cord through the — —.
Four major bones make up the cranium: —, —, —, and —.
Face is composed of — bones: maxillae, zygomas, mandible, and orbit.
Spinal column
Body’s central supporting structure
— vertebrae are divided into five sections:
— Cervical
— Thoracic
— Lumbar
— Sacral
— Coccygeal
Injury to the vertebrae can result in —-.
Vertebrae are connected by — and separated by cushions, called — —.
Spinal column is almost entirely surrounded by —.
cranium facial
foramen magnum
occipital parietal temporal frontal, 14
33, 7, 12, 5, 5, 4
paralysis, ligaments, intervertebral disks, muscles
Head Injuries
Traumatic insult to the head that may result in injury to soft tissue, bony structures, or the brain.
Account for more than — of all traumatic deaths
The patient may have sustained additional trauma.
Closed injuries
The brain has been injured but there is — — into the brain.
Open injuries
An opening from the brain to the outside world exists.
Often caused by —- trauma
May be —- and —- brain tissue
— and — — crashes are among the most common MOI.
Head injuries also commonly occur:
In victims of assault
During sports-related incidents
half
no opening
penetrating, bleeding exposed
falls motor vehicle

General Signs and Symptoms of a Head injury
Most important 3
— — —
— breathing pattern
— heart rate
Indicates intracranial —-
Brain being pushed against skull and compressing areas of the —-
Once at irregular respiratory patterns it is close to being deadly
widening pulse pressure
irregular
slow
pressure, brainstem
Scalp Lacerations
Can be minor or serious
Even small lacerations can lead to significant blood loss.
May be severe enough to cause —- shock
They are often an indicator of —-, more — injuries.
hypovolemic, deeper serious
Skull Fracture
Significant force applied to the head may cause a skull fracture.
May be open or closed, depending on whether there is an overlying laceration of the scalp
Injuries from bullets or other penetrating weapons often result in skull fractures.
Signs of skull fracture include:
Patient’s head appears —-.
Visible —- in the skull
— (bruising) that develops under the — (— —)
— sign of skull fracture
— that develops behind one — over the — — (— —)
— sign of skull fracture
deformed, cracks, ecchymosis, eyes, late raccoon eyes, ecchymosis, ear mastoid process, late, battle sign
physical
Skull Fracture
Linear skull fractures
Account for about 80% of all skull fractures
Radiographs are required to diagnose a linear skull fracture because there are no —- signs.
Depressed skull fractures
Result from — —- direct trauma to the head with a — object
— and — bones are most susceptible.
Bony fragments may be driven into the —.
Patient usually —-
Basilar skull fractures
Associated with — — trauma
Usually occur following diffuse impact to the head
Signs include —- drainage from the ears (Halo sign), — —, and — —.
Open skull fractures
Often associated with trauma to multiple body systems
Brain tissue may be exposed to the environment.
— mortality rate or with survival high chance of brain —-
physical
high energy, blunt, frontal parietal, brain, unconscious
high energy, diffuse, CSF, raccoon eyes, battle sign
multiple, environment, high, death
Traumatic Brain Injuries
Most —- of all head injuries
Two broad categories: primary (direct) injury and secondary (indirect) injury
Primary brain injury results —- from impact to the head.
Secondary brain injury increases the — of the primary injury.
Secondary injury may be caused by:
—
—
Cerebral —
Intracranial —
Increased intracranial —
Cerebral —
—
serious, instantaneously, severity
hypoxia, hypotension, edema, hemorrhage, pressure, ischemia, infection
Traumatic Brain Injuries
The brain can be injured directly by a penetrating object or indirectly as a result of external forces.
A ———— injury can result from striking a windshield.
Head hits the windshield; brain comes to an abrupt —- by striking the —- the —-.
Head falls back against headrest; brain slams into the —- of the —-.
Front hit and back hit to the brain
Cerebral edema may not develop for several —-.
Low blood —- levels aggravate cerebral edema.
Monitor the patient for any —- activity.
coup-contrecoup, stop, front skull, back skull
hours, oxygen, seizure
Intracranial Pressure
Accumulations of —- within the skull or —- of the brain can rapidly lead to an increase in —- —-
Increased ICP squeezes the brain against bony prominences within the cranium.
Signs of increased intracranial pressure
Cheyne-Stokes respirations = —, —- breaths with period of —-)
Ataxic (—) respirations = —, —, respirations with no identifiable —-
— pulse rate, headache, nausea, vomiting, decreased alertness, bradycardia
Sluggish or —- pupils
— (extension) posturing
— or — blood pressure.
— reflex
Intracranial hemorrhage
— inside the skull also increases the ICP.
Bleeding can occur:
Between the skull and dura mater
Beneath the dura mater but outside the brain
Within the tissue of the brain itself
blood, swelling, intracranial pressure, slow, deep, apnea, Biot, chaotic irregular, pattern, decreased, nonreactive, decerebrate, increased widened, cushing
bleeding
Cushing’s Traid/Reflex
Sign of dangerously high —- —-
Three components
—
—
— (Cheyne-Stokes or Ataxic/Biot)
intracranial pressure, hypertension, bradycardia, irregular respirations
Intracranial Pressure
Epidural hematoma
Accumulation of blood between the —- and — —
Nearly always the result of a blow to the head that produces a —- fracture
Subdural hematoma
Accumulation of blood —- the dura mater but —- the brain
Occurs after —- or injuries involving strong —- forces
May or may not be skull fracture
Intracerebral hematoma
Bleeding within the —- —— itself
Can occur following a —- injury to the head or because of rapid —- forces
Subarachnoid hemorrhage
Bleeding occurs into the — —, where the —- circulates.
Results in —- CSF and signs of —- irritation
Common causes include —- or rupture of an —-.
skull, dura mater, linear
beneath, outside, falls, deceleration
brain tissue, penetrating, deceleration
subarachnoid space, CSF, bloody, meningeal, trauma, aneurysm
Concussion
A blow to the —- or —- may cause concussion of the brain.
Closed injury with a temporary loss or alteration of part or all of the brain’s abilities to —- without demonstrable —- damage to the brain
About 90% of patients do not experience a loss of consciousness.
A patient with a concussion may be confused or have amnesia.
Retrograde amnesia = loss of memories from —- the event
Anterograde amnesia = inability to form — memories
Usually a concussion lasts only a —- time.
Ask about these symptoms:
Dizziness
Weakness
Visual changes
Nausea and vomiting
Ringing in the ears
Slurred speech
Inability to focus
head, face, function, physical, confused, amnesia, before, new, short
Contusion
Far more —- than a concussion
Involves —- injury to brain —-
May sustain long-lasting and even permanent damage
A patient may exhibit any or all of the signs of brain injury.
serious, physical, tissue,
Other Brain Injuries
Brain injuries can also arise from medical conditions, such as blood —- or —-.
Signs and symptoms of non-traumatic injuries are often the —- as those of traumatic brain injuries.
clots, hemorrhages, same
Spine Injuries
— injuries can result from a fall.
Forces that compress the patient’s vertebral body can cause —- of disks.
Motor vehicle crashes can —- the spine.
Rotation-flexion injuries of the spine result from rapid —- forces.
When the spine is pulled along its length (hyperextension), it can cause —-.
Any one of these unnatural motions, as well as excessive lateral bending, can result in fractures or neurologic deficit.
When bones of the spine are altered from traumatic forces, they can fracture or move out of place.
compression, herniation, overextend, acceleration, fractures,
Patient Assessment
Always suspect a possible head or spinal injury with:
— — collisions
— vs. motor vehicle collisions
—
— trauma
— trauma to the head, neck, back, or torso
Rapid — injuries
—
Axial loading injuries
— accidents
motor vehicle, pedestrian, falls, blunt, penetrating, deceleration, hangings, diving
Scene Size-up
Scene safety
Evaluate every scene for hazards to your health and the health of your team or bystanders.
Be prepared with appropriate standard precautions.
Call for ALS as soon as possible.
Mechanism of injury/nature of illness
Look for indicators of the MOI.
Consider how the MOI produced the injuries expected
Always remember to consider —- —-
c-spine immobilization
Primary Assessment
Focus on identifying and managing life-threatening concerns.
— of on-scene time and recognition of a critical patient increase the patient’s chances for survival or a reduction in the amount of irreversible damage.
Spinal immobilization considerations
Assess the patient in the position found.
Determine whether or not a — — needs to be applied.
Assess the scene to determine the risk of injury.
Form a general impression based on level of consciousness and chief complaint.
The backboard often places the patient in an anatomically — position for a long period of time.
— to areas of skin may become compromised.
Some patients could experience — compromise while lying flat.
Try to minimize the amount of time a patient is on a backboard.
reduction, cervical collar, incorrect, circulation, respiratory,
Primary Assessment
Cervical collar
Helps maintain spinal motion restriction
The best time to apply the cervical collar depends on the patient’s injuries.
Once the cervical collar is on, do —- remove it unless it causes a problem with maintaining the —-.
Assessing for signs and symptoms of a head or spine injury
Ask about the chief complaint.
Confused or slurred speech, repetitive questioning, or amnesia in responsive patients are good indications of a —- injury.
In the setting of trauma, assume your patient has a —- injury until your assessment proves otherwise.
Unresponsive trauma patients should be assumed to have a —- injury.
Patients with a decreased level of responsiveness should be considered to have a —— injury based on their chief complaint.
not, airway, head, head, spinal, spinal
Primary Assessment
Airway, breathing, and circulation considerations
Use a jaw-thrust maneuver to open the airway.
If the jaw-thrust maneuver is ineffective, use the head tilt–chin lift maneuver as a — —.
— may occur in the patient with a head injury.
Irregular breathing may result from increased — —.
Oxygen is —- indicated for patients with head and spinal injuries.
Pulse oximeter values should be maintained above —-.
Hyperventilation should be reserved for specific conditions.
A pulse that is too —- in the setting of a head injury can indicate a serious condition.
A single episode of hypoperfusion in a patient with a head injury can lead to significant brain damage and even death.
Assess for signs and symptoms of shock.
Control bleeding.
last resort, vomiting, intracranial pressure, always, 90%, slow, hypoperfusion
Primary Assessment
Manner of transport
Patients with impaired airways, open head wounds, or abnormal vital signs may need to be rapidly extracted from a motor vehicle and transported.
Ensuring a patent airway and providing supplemental oxygen is paramount.
Suction should be readily available.
Maintain immobilization of the spine.
ok?
ok
Secondary Assessment
Instruct the patient to keep still and not to move the head or neck.
Physical examinations
May be a systematic head-to-toe, full-body scan or a systematic assessment that focuses on a certain area or region of the body
Vital signs
Significant head injuries may cause the pulse to be —- and the BP to —-.
With neurogenic shock, the blood pressure may —-, and the heart rate may —- to compensate.
Respirations will become —-.
Use monitoring devices.
Use DCAP-BTLS to examine the head, chest, abdomen, extremities, and back.
Check perfusion, motor function, and sensation in all extremities prior to moving the patient.
A decreased —- is the most reliable sign of a head injury.
Look for leaking —- or —-.
Assess pupil — and reaction to —-, and continue to monitor the pupils.
Do not probe open scalp lacerations with your gloved finger.
slow, rise, decrease, increase, erratic, LOC, blood, CSF, size, light
Secondary Assessment
Neurologic examination
Perform baseline assessment using the — — — (GCS).
If your jurisdiction uses the Revised Trauma Score (RTS), then the findings from the GCS will be used in determining the RTS value.
Record levels of consciousness that — or —-.
Spine examination
Inspect for DCAP-BTLS, and check the extremities for circulation, motor, or sensory problems.
If there is impairment, note the level.
— or — when you palpate is a warning sign.
Other signs and symptoms: deformity, numbness, weakness, or tingling in the extremities; and soft-tissue injuries
Glasgow coma scale, fluctuate, deteriorate, pain tenderness
Reassessment
Repeat the primary assessment.
Reassess vital signs and the chief complaint.
Recheck patient interventions.
Reassess at least every 5 minutes.
Interventions
Compare — vital signs with — vital signs.
Rapid deterioration of neurologic signs is a sign of an expanding — in the brain or rapidly progressing brain —-.
If CSF is present, cover the wound with sterile gauze, but do not bandage tightly.
Administer high-flow oxygen and apply a cervical collar.
Communication and documentation
Your documentation should include:
The history you obtained at the scene
Your findings during your assessment
Treatments you provided
How the patient responded to them
Document vital signs for unstable patients every 5 minutes; every 15 for stable patients.
baseline, repeated, bleed, swelling
Emergency Medical Care of Head Injuries
Three general principles:
Establish an adequate —-.
Control —- and provide adequate circulation to maintain cerebral —-.
Assess the patient’s baseline —- and continuously monitor.
airway, bleeding, perfusion, LOC
Emergency Medical Care of Head Injuries
Managing the airway
Perform the —- —- maneuver.
Once the airway is open, maintain the head and cervical spine in a neutral, in-line position until you have placed a — — and have secured the patient on a —.
Remove any foreign bodies, secretions, or vomitus.
Check ventilation.
Give supplemental oxygen to any patient with suspected head injury.
Focus on identifying —- breathing patterns
On any suspected head injuries, NEVER use a —— airway
If there is a basilar skull fracture, the NPA can enter the cranium
jaw thrust, cervical collar, backboard, abnormal, nasopharyngeal
Emergency Medical Care of Head Injuries
Circulation
Begin CPR if the patient is in cardiac arrest.
Active blood loss aggravates hypoxia.
You can almost always control bleeding from a scalp laceration by applying —- —- over the wound.
Shock is usually the result of —-.
Indicates that the situation is critical
Transport immediately to a trauma center.
Patients with head injuries are usually never in shock, usually have ——
But if shock is present it indicates a severely progressed head injury
direct pressure, hypovolemia, hypertension
Emergency Medical Care of Head Injuries
Cushing triad
Indicate increased ICP
—
—
Irregular respirations (——- respirations or —/—- respirations)
Manage shock, administer oxygen, and ventilate as necessary, avoiding ——.
Hyperventilate = vasoconstriction = further increase blood pressure
hypertension, bradycardia, irregular, Cheyne-Stokes, Ataxic/Biot, hyperventilation
Emergency Medical Care of Spinal Injuries
Follow standard precautions.
Maintain the patient’s airway while keeping the spine in the proper position.
Assess respirations and give supplemental oxygen.
Managing the airway
Perform the —- —- maneuver.
Consider inserting an oropharyngeal airway.
Have a suctioning unit available.
Provide supplemental oxygen.
Spinal motion restriction of the cervical spine
Immobilize the —- and —- so that bone fragments do not cause further damage.
Never force the head into a neutral, in-line position.
Immobilize the patient in his or her — position.
jaw thrust, head trunk, current
Emergency Medical Care of Spinal Injuries
Cervical collars
Provide preliminary, partial support
Should be applied to every patient who has a possible —- injury
To be effective, a rigid cervical collar must be the correct size.
Once the patient’s head and neck have been manually stabilized, assess the —, —-, — in all extremities. Then assess the cervical spine area and neck.
Maintain —- support until the patient has been fully secured to the backboard or vacuum mattress.
spinal, pulse motor sensory, manual
Preparation for Transport
Supine patients
Secure to a long —- or vacuum mattress.
Another procedure to move a patient from the ground to a backboard is the four-person —- —-.
You may also —- the patient onto a backboard or vacuum mattress.
Vacuum mattress
An alternative to the long backboard is a vacuum mattress.
Molds to the specific contours of patient’s body
Excellent for the elderly or a patient with abnormal curvature of the spine
Can be used on a supine, sitting, or standing patient
backboard, log roll, slide,
Preparation for Transport
Sitting patients
Use a —- backboard to restrict movement of the cervical and thoracic spine.
Then secure the short board to the —- board.
Exceptions include situations in which:
You or the patient is in danger.
You need immediate access to other patients.
The patient’s injuries justify urgent removal.
Standing patients
Transfer patient to a position in which spinal motion restriction can be maintained.
Clinical indications for spinal motion restriction:
Spinal tenderness or pain
Altered level of consciousness
Neurologic deficits
Obvious spinal deformity
High-energy trauma in an intoxicated patient or one with a distracting injury
short, long
Preparation for Transport
Spinal immobilization devices
Assume the presence of spinal injury in all patients who have sustained —- injuries.
Use —- in-line stabilization or a — — and long —.
Short backboards
Vest-type device and rigid short board
Designed to immobilize and restrict movement of the head, neck, and torso
Used to immobilize —- patients found in a —- position
Long backboards
Provide —- —- spinal immobilization and motion restriction to the head, neck, torso, pelvis, and extremities
Used to immobilize patients found in —- position
head, manual, cervical collar, backboard, noncritical, sitting, full body, any
Helmet Removal
A helmet that fits well prevents the patient’s head from moving and should be —- —-, provided:
There are no impending —- or —- problems.
It does not interfere with —- and —- of airway or ventilation problems.
You can properly immobilize the —-.
Remove a helmet if:
It is a — —- helmet.
It makes assessing or managing —- problems difficult.
It prevents you from properly immobilizing the —-.
It allows excessive —- movement.
The patient is in —- —-.
left on, airway breathing, assessment, treatment, spine, full face airway, spine, head, cardiac arrest
Helmet Removal
Preferred method
Removing a helmet should always be at least a —- —— job.
You should first consult with —- —- about your decision to remove a helmet.
Alternate method
The advantage is that it allows the helmet to be removed with the application of —- force, therefore reducing the likelihood of — occurring in the neck.
The disadvantage is that it is slightly more —- consuming.
Remove the chin strap.
Remove the face mask.
Pop the jaw pads out of place.
Place your fingers inside the helmet.
Hold the jaw with one hand and the occiput with the other.
Insert padding behind the occiput.
The person at the side of the patient’s chest is responsible for making sure that the head and neck do not move during removal of the helmet.
Remember that children may require additional padding to maintain the in-line neutral position.
two person, medical control, less, motion, time,
The brain, a part of the central nervous system (CNS), is divided into the:
cerebrum, cerebellum, and brainstem.
cerebrum, brainstem, and spinal cord.
cerebellum, cerebrum, and spinal cord.
spinal cord, cerebrum, and cerebral cortex.
cerebrum, cerebellum, and brainstem.
As you are assessing a 24-year-old man with a large laceration to the top of his head, you should recall that:
the scalp, unlike other parts of the body, has relatively fewer blood vessels.
blood loss from a scalp laceration may contribute to hypovolemic shock in adults.
any avulsed portions of the scalp should be carefully cut away to facilitate bandaging.
most scalp injuries are superficial and are rarely associated with more serious injuries.
blood loss from a scalp laceration may contribute to hypovolemic shock in adults.
A patient who experiences an immediate loss of consciousness followed by a lucid interval has a(n):
epidural hematoma.
subdural hematoma.
concussion.
contusion.
epidural hematoma.
A 44-year-old man was struck in the back of the head and was reportedly unconscious for approximately 30 seconds. He complains of a severe headache and “seeing stars,” and states that he regained his memory shortly before your arrival. His presentation is MOST consistent with a(n):
contusion.
concussion.
subdural hematoma.
intracerebral hemorrhage.
concussion.
A young male was involved in a motor vehicle accident and experienced a closed head injury. He has no memory of the events leading up to the accident but remembers that he was going to a birthday party. What is the correct term to use when documenting his memory loss?
Concussion
Cerebral contusion
Retrograde amnesia
Anterograde amnesia
Retrograde amnesia
A distraction injury to the cervical spine would MOST likely occur following:
a diving accident.
blunt neck trauma.
hyperextension of the neck.
hanging-type mechanisms.
hanging-type mechanisms.
During immobilization of a patient with a possible spinal injury, manual stabilization of the head must be maintained until:
an appropriate-size extrication collar has been placed.
the patient is fully immobilized on a long backboard.
a range of motion test of the neck has been completed.
pulse, motor, and sensory functions are found to be intact.
the patient is fully immobilized on a long backboard.
Your patient is a 21-year-old male who has massive face and head trauma after being assaulted. He is lying supine, is semiconscious, and has blood in his mouth. You should:
insert a nasal airway, assess his respirations, and give 100% oxygen.
suction his airway and apply high-flow oxygen via a nonrebreathing mask.
manually stabilize his head, log roll him onto his side, and suction his mouth.
apply a cervical collar, suction his airway, and begin assisting his ventilations.
manually stabilize his head, log roll him onto his side, and suction his mouth.
A man is found slumped over the steering wheel, unconscious and making snoring sounds, after an automobile accident. His head is turned to the side and his neck is flexed. You should:
gently rotate his head to correct the deformity.
carefully hyperextend his neck to open his airway.
apply an extrication collar with his head in the position found.
manually stabilize his head and move it to a neutral, in-line position.
manually stabilize his head and move it to a neutral, in-line position.
You should NOT remove an injured football player’s helmet if:
a cervical spine injury is suspected, even if the helmet fits loosely.
the patient has a patent airway, even if he has breathing difficulty.
he has broken teeth, but only if the helmet does not fit snugly in place.
the face guard can easily be removed and there is no airway compromise.
the face guard can easily be removed and there is no airway compromise.