Mid2 (PNS) [LCCW]

Plexuses are formed by the ___ of the contributing spinal nerves.

anterior primary rami

T|F: The lumbar plexus is usually formed by the L1-L4 spinal nerves, but the T12 spinal nerve may contribute to its formation.

True

Lumbosacral radiculopathy most commonly involves what group of spinal nerves:

L4,L5,S1

Stenosis at what level of the IVF's would most likely cause L5 radiculopathy?

L5-S1 IVF

Herniation at what level of discs would most likely cause L5 radiculopathy?

L4-L5 disc

If a patient's symptoms of pain, tingling, and numbness in the medial shin and medial foot are due to radiculopathy, which spinal nerve would most likely be involved?

L4

If a patient's symptoms of pain, tingling, and numbness in the lateral calf are due to radiculopathy, which spinal nerve is most likely involved?

S1

A patient presents symptoms of low back pain and pain, tingling, and numbness in their left lower extremity. Given the pt's complaints, you suspect a lumbosacral radiculopathy. Pt walks across the room on toes, presents limited ability to do on left side. Which nerve do you suspect responsible for the motor weakness?

S1

A patient presents symptoms of right lower back pain and pain, tingling, and numbness in their right lower extremity. Given the pt's complaints, you suspect lumbosacral radiculopathy. Pt presents weakness of (EHL) Extensor Hallicus Longus. Which nerve do you suspect responsible for the motor weakness?

L5

You pt's quadriceps DTR is hyporeflexic. If the decreased reflex activity is due to radiculopathy, which spinal nerve would most likely be compromised?

L4

You pt's achilles DTR is hyporeflexic. If the decreased reflex activity is due to radiculopathy, which spinal nerve would most likely be compromised?

S1

Sensory complaints caused to a peripheral nerve disorder may be erroneously identified as being due to a radiculopathy. Sensory complaints by a common peroneal nerve injury would most likely be mis-diagnosed as being due to what kind of radiculopathy.

L5

Weakness of the knee extension would most likely result from lesion of what peripheral nerve?

femoral

Weakness of foot dorsiflexion would most likely result from lesion of what peripheral nerve?

common peroneal

The iliohypogastric, ilioinguinal, and genitofemoral nerves are branches of what plexus.

lumbar

The posterior femoral cutaneous nerve is a branch of what plexus.

sacral

The lateral femoral cutaneous nerve is a branch of what plexus.

lumbar

What peripheral nerve(s) are formed by contributes from L2-L4 spinal nerves.

femoral & obturator

T|F: The obturator nerve innervates muscles and sensation in the thigh.

True

T|F: The obturator nerve innervates muscles in the thigh and sensation in the leg.

False

T|F: The obturator nerve innervates muscles and sensation in the leg.

False

The condition "Meralgia Parasthetica" involves compression of what nerve.

lateral femoral cutaneous

What nerve is potentially subjected to compression from the piriformis muscle?

sciatic

The spinal nerve origin of the phrenic nerve is:

C3-C5

The cervical plexus is formed by what spinal nerves?

C1-C4

What are the sensory branches of the cervical plexus?

- Greater Auricular Nerve (C2-C3)

- Transverse Cervical Nerve (C2-C3)

- Lesser Occipital Nerve (C2)

- Supraclavicular Nerves (C3-C4)

What are the motor branches of the cervical plexus?

- Phrenic Nerve (motor innervation to the diaphragm; C3-C5)

- Nerves to Geniohyoid and Thyrohyroid (travels with the hypoglossal nerve; C1)

- Ansa Cervicalis (C1-C3)

What are the branches of the Ansa Cervicalis?

(Infrahyoid muscles)

- Superior/Inferior belly of Omohyoid muscle

- Sternohyoid

- Sternothyroid

The infrahyoid muscles are innervated by:

branches of the Ansa Cervicalis

The descendens hypoglossi and descendens cervicalis are:

portions of the Ansa Cervicalis

A patient presents symptoms of radicular pain and rash around the left side of their torso to the abdomen in a small band at the level of the umbilicus. Which spinal nerve is most likely compromised?

T10

The intercostal nerves come from the ___ of the ___ spinal nerves.

anterior primary rami / thoracic

Herpes zoster most commonly affects what level of spinal nerves.

thoracic

Herpes zoster results from reactivation of what virus?

chicken pox

The sympathetic innervation of the lower extremity originates from what spinal cord level(s):

- lower thoracic

- upper lumbar

The IML Intermediolateral cell column contains the cell bodies of:

pre-ganglionic neurons of the ANS

The cell bodies of somaomotor neurons are located in what part of the spinal cord?

ventral horns

Sympathetic innervation of the head and face comes from what spinal cord level(s).

T1

Ganglia of the paravertebral chain contain the cell bodies of:

sympathetic pre-ganglionic

Loss of sympathetic innervation of the head and face would cause the pupils to become:

abnormally constricted

The celiac ganglion is in ___ of the ___.

front / spinal column in the abdominal cavity

The greater, lesser, and least splanchnic nerves contain axons of what kind of sympathetic neurons?

pre-ganglionic

The superior mesenteric & inferior mesenteric are what type of ganglia?

pre-vertebral

What CN innervates the superior oblique muscle?

CN-IV: trochlear

Drooping of the upper eyelid would most likely result from what CN lesion?

CN-III

The first branch of the trigeminal nerve passes through what foramina?

superior orbital fissure

CN of the efferent limb of the pupillary (light) reflex is:

CN-III

Pt is looking straight ahead while their left eye is deviated towards their nose. What CN is most likely compromised?

CN-VI

What CN transmits taste?

CN-VII & IX

What CN is the afferent limb of the corneal (blink) reflex?

CN-V

What CN innervates the salivary glands?

CN-VII & IX

Loss of facial sensation would most likely occur due to a session of what CN?

CN-V

What CN contain parasympathetic fibers as they exit the brainstem?

CN-III, VII, IX, & X

The uvula will deviate ___ with a CN lesion.

away from