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In the PNS there are 12 cranial nerves, what do they do?
these peripheral nerves carry information from sensory receptors to the CNS and from the CNS to muscles, glands, and internal organs and blood vessels.
afferent (sensory) - info towards the CNS from sensory receptors
efferent (motor) - info from CNS to muscles, glands
+ autonomic messages that impact/control internal organs and blood vessels
What is the function of the cerebral cortex?
memory, thought, reasoning, sensation, and voluntary movement
What is the function of the frontal lobe?
frontal lobe controls personality, behavior, emotions, and intellectual function
Where is Broca’s area? What does it do?
Broca’s area is found in the frontal lobe.
controls speech
What is the function of the temporal lobe?
the temporal lobe controls smell, taste, and hearing (sensory lobe)
Where is Wenicke’s area? What does it do?
Wernicke’s area is found in the temporal lobe
control language comprehension
What is the function of the parietal lobe?
the parietal lobe controls sensation
what is the function of the occipital lobe?
the occipital lobe is the visual receptor center
what causes damage to cerebral cortex?
specialized neurologic cells are deprived of blood supply
what are the effects of damage to the cerebral cortex?
impaired ability to understand and process language
motor weakness
paralysis
loss of sensation
Where do the cranial nerves extend? what do they supply? Is there an exception?
cranial nerves mainly supply head and neck
C1-C3 extend from cerebrum
C3-C12 extend form midbrain and brain stem
EXCEPTION: vagus nerve travels to heart, respiratory muscles, stomach, and gallbladder
what are some balance tests that can be done to a pt?
gait walking test - watch a pt as they walk 10-20 ft, turn, and come back (assess how they are walking)
tandem walk - heel-to-toe walking
what is RAM and what are some tests that can be done to test this?
RAM = Rapid alternating movements
tests that can be done:
“patty cake” - have pt essentially play patty cake with thighs/knees, using both hands and turning hands over (dorsal to ventral), increasing speed
OR
finger to finger test - touch thumb to each finger and them go the other way, starting with the index finger
finger to nose test
heel to shin test
what is abnormal when looking at gait?
pt should walk with a sense of freedom
abnormal would be:
pt being:
stiff
wide box of support
staggering
lack of swinging or rigid arms
unequal rhythm of steps
what is ataxia?
uncoordinated or unstable gait
what is abnormal to see in Romberg test?
patient should not be swaying, falling, or widening their feet
if these occur then it’s a positive Romberg (loss of balance w/ closed eyes)
what is normal to see when looking at Tandem walk?
patient should walk in a straight line and stay balanced
what are some anterolateral (spinothalamic) tests?
to test pain: have pt identify between sharp and dull sensations (2 seconds between each stimulus)
light touch: touch cotton to skin in random sites, order, and intervals and have pt tell you where they feel the touch
What is the vibration (tuning fork) test?
put vibration fork over bony prominent
have pt tell you when they start and stop feeling vibration on bony prominent
pt’s with neuropathy will not feel anything
what is the position (kinesthesia) test?
have pt close their eyes, move an extremity (ex. finger) in a certain direction and have pt identify in what direction the extremity was moved
ask pt what way it was moved
what is stereognosis?
have pt close their eyes, put an item in their hands, pt should be able to ID the object with their eyes closed (should be able to ID based on shape, weight, and size)
what is graphestesia?
have pt close their eyes and draw on pt’s palm a number, pt should be able to read what was on palm with eyes closed wha
what is two-point discrimination?
tests the pt’s ability to sense two separate pinpoints at the skin - should be able to tell nurse that they felt two pokes on their arm for example
nurse should ask if they feel 1 or 2 points and pt should be able to ID 1 or 2 and where
what is the extinction test?
touch both sides of the body at the same (for example, poke forearm bilaterally at the same time).
pt should be able to tell nurse they felt both sensations
nurse should ask how many did they feel
what is point location?
have pt close their eyes, poke wherever on their body, and have pt tell them where they poked by pointing at the location with their finger
How do you test DTR?
limb should be relaxed and muscle partially stretched
short, snappy blow with reflex hammer at muscle’s insertion tendon with relaxed hold on hammer
bounce, do not let hammer rest on tendon
use the flat end of hammer when tendon is wider
What are some gerontological considerations in aging adults for the eyes?
Pupil size decreases (normal pupil size is 2-3; older adults normal pupil size is 1-2)
Presbyopia: lens lose elasticity, lens become hard and glasslike, which decreases the ability of the eye to change shape and accommodate for near vision
HOW TO USE THE SNELLEN CHART?
Shield one eye at a time during test
If the person wears contact lenses or glasses, leave them on; remove only reading glasses
Have pt read till the smallest line possible; encourage to try the next smallest line also
If the pt is unable to see even the largest letters, shorten distance to chart until the person is able to see it, adn record the distance (ex. 10/20)
HOW TO USE THE JAEGER CARD?
Used for pt’s who report increasing difficulty with reading
Hold the card 14 in away from the eye (35cm); this distance equals print size on 20-foot chart
Test each eye separately
If pt is wearing contacts/glasses remove them
Normal result is 14/14 in each eye, read w/o hesitancy and w/o moving the card closer or farther away
ABNORMAL FINDINGS: EYELID ABNORMALITIES
Periorbital edema: caused by crying, infection, trauma, Chronic Heart Failure, and Chronic Kidney Disease
Exophthalmos (protruding eyes)
Enophthalmos (sunken eyes)
Ptosis (drooping upper lif) - CN III damage, sympathetic nerve damage (Horner syndrome), congenital
What are some visual clues that can help you ID if a person has hearing loss?
Lip reading or watching your face and lips
Frowning or straining forward to hear
Posturing head to catch sounds with the better ear
Misunderstand questions, frequently
Irritable or shows startle reflex when you raise your voice
The person's speech sounds garbled, vowel sounds distorted
Inappropriately loud voice
Flat, monotonous tone of voice
Whispered Voice Test →
Stand 2 feet away behind pt
Test one ear (uncovered ear) at a time while one ear is covered
Whisper 3 random number/letter combinations 1-2 ft away from ear
Passing score is correct repetition of 4-6 possible numbers and letters
How do you conduct a Weber Test?
assess whether sound is heard louder in one ear compared to the other when a tuning fork is placed on the midline of the forehead
Normal: sound heard equally in both ears
Abnormal: heard better on one ear
Conductive hearing loss (affected ear) sounds is heard louder in the affected ear (where there’s conductive hearing loss) — sound lateralizes to poorer ear
Sensorineural Hearing loss (unaffected ear) sound is heard louder in the better ear (where there’s no sensorineural loss) — sound lateralizes to better ear
How do you conduct a Rinne test?
how well a person hears a tuning fork when placed on the mastoid bone (bone conduction) v. when placed near the ear (air conduction)
Normal: air conduction is better than bone conduction
Conductive hearing loss (negative Rinne): bone conduction is better than air conduction
Sensorineural hearing loss: air conduction (AC) is better than bone conduction (BC)
What do the Montgomery’s glands do?
they are sebaceous glands that produce a protective lipid material during lactation
What is the area most common for cancer?
Tail of Spence, upper outer quadrant
What are some normal considerations for older women when looking at their breasts?
after menopause, estrogen and progesterone release from the ovaries decreases causing —> glandular tissue atrophy at the breast (sagging)
decreased breast size - which may cause inner structures to be more noticeable and palpable (may start to feel a lump that has always been there)
lactiferous ducts are more palpable and feel firm + stringy b/c of fibrosis and calcification
axillary hair product decreases
what is gynecomastia?
when breast tissue in men becomes large unilaterally (temporary during adolescent years)
this could also happen in older men b/c of low testosterone production
what do changes in overlying skin of lumps mean?
erythema and warmth = inflammation
dimpling = indication of cancer or radiation therapy
swelling = outside of puberty is abnormal (although they might get swollen before period due to a surge of progesterone)
What are some breast cancer risk factors?
two or more primary family members have had breast cancer at an early age
oral contraceptives
how often should you be doing a self-breast exam?
monthly
when should you start going for mammography?
start at 40-44 y.o.
when can you start annual mammographies?
starts at the age of 45-54 y.o.
when can you start biennial (every other year) mammographies?
over the age of 55
how does a normal breast look like?
common to have slight asymmetry in size
skin should be smooth and even color throughout
no redness, bulging, or dimpling
no lesions
no edema
When doing the shrug test in front of the mirror, what should you see?
breasts should move at the same time, symmetrically as you shrug your shoulders (h
what is diaphoresis?
excessive sweating
what does ABCDE mean in relation to skin?
A - Asymmetry
B - border
C- color
D- diameter
E - evolution
what is the normal pupil size in general? what is the normal pupil size for elderly?
normal pupil size is 2-3; older adults normal pupil size is 1-2
What are some abnormalities you can find in the mouth?
circumolar pallor: shock/anemia
cyanosis": hypoxemia
cherry red: carbon monoxide poisoning, acidosis from aspirin poisoning, or ketoacidosis
cheilitis: cracking on the corners
lesions at mouth could indicate Herpes complex
What is the tonsil size scale
1+ - visible *normal
2+ - ½ way between tonsillar pillar and uvula *normal
3+ touching uvula
4+ tonsils touching each other
**biggest concern is ability to breathe
what is the DTR scale?
4 - very brisk, hyperactive, with clonus (usually indicative of disease) *clonus= you feel and see rapid, rhythmic contraction; involuntary twitching
3 - brisker than average, may indicate disease
2 - average, normal
1 - diminished, low normal, or occurs with reinforcement
0 = no response, indicates paralysis
Babinski reflex
Babinski reflex: babies are born with this (toes fan outward)
With reflex hammer draw an upside down “J” starting from bottom of heel and inward across ball of foot
Normal response: plantar flexion of toes and inversion and flexion of flexion of forefoot
Abnormal response: great toe extension and toes fanning outwards
Negative: toes scrunch inward
Positive: toes fan out
risk for CVA (stroke)
HTN
Smoking
Heart disorders
F.A.S.T. (STROKE SIGNS)
F- face drooping *usually seen on one side
A- Arm and leg weakness
S - speech difficulty – slurring, not making sense
T - time to call 911
Other symptoms: vision loss, dizziness, confusion, incontinence, and tingling or numbness throughout the body
Most common causes of decreased visual functioning in older adults:
Cataract formation - lens opacity, resulting from clumping of proteins in lens
D/T altered metabolic processes in lens – water accumulation, changes in lens fiber structure that alters transparency
S&S: abnormal color perception, glare that worsens at night, and gradual decrease in vision
Tx: changes in glasses prescription, strong reading glasses/magnifiers, increase lighting, lifestyle adjustment (surgery only if these are not acceptable)
Glaucoma - increase IOP; chronic open-angle glaucoma is the most common type; high IOP causes optic nerve atrophy and peripheral visual field loss → CAUSES NERVE DAMAGE TO OPTIC NERVE
Risk factors: increased age, AA, genetic (possibly)
Early dx and tx are important to prevent blindness
Types:
Primary open-angle glaucoma: outflow of aqueous humor is decreases in trabecular meshwork → clogs drainage channels → damage to optic nerve
Angle-closure glaucoma: reduction in outflow of aqueous humor from angle closure
Acute or chronic
Age-related macular degeneration (AMD) - breakdown of cells in macula of retina; loss of central vision (see a spot right in the middle) **MOST COMMON CAUSE OF VISION LOSS
Two types:
Dry (nonexudative) - closer vision is impaired; slow progression and painless loss of vision
Wet (exudative) - rapid onset; AMD-related blindness
Risk factors: light-colored eyes, family history, smoking, HTN,
S&S: blurred/darkened vision; blind spots; distortion of vision
To diagnose use AMSLER GRID
Diabetic retinopathy - vision loss caused by uncontrolled diabetes
STRABISMUS - double vision
Pt can’t focus both eyes to one object
One eye deviates in (esotropia)
One eye deviates out (exotropia)
One eye deviates up (hypertropia)
One eye deviates down (hypotropia)
Causes: thyroid disease, neuromuscular problems of the eye muscles, retinal detachment repair, and cerebral lesions