The cranial nerves are a set of 12 paired
nerves in the back of your brain. Cranial
nerves send electrical signals between your
brain, face, neck and torso. Your nerves
help you taste, smell, head and feel
sensations. They also help you make facial
expressions, blink your eyes and move your
tongue.
SMELL
With the , a patient
should be able to identify
common, familiar and non-
irritating odors
coffee
soap
flowers
fresh orange / kalamansi
camphor (Vicks)
such as alcohol, ammonia,
perfume, etc.
this will stimulate pain
rather than olfaction
which tests CN V rather
than CN I
CN I (OLFACTORY)
N: Identify scent in each
nostril
Abn: Neurogenic
Anosmia
SENSORY TO FACE AND TEETH
pain
touch
MOVEMENT OF MUSCLES OF MASTICATION
temporal muscles
masseter muscles
palpate the Masseter
instruct the patient to bite
down hard
next, ask the patient to
against resistance
applied by the instructor
Corneal Reflex
use a large Q-tip with the
cotton extended into a wisp
ask the patient to look at a
distant object then
approaching laterally,
look for the eye to blink
Repeat this on the other eye
MOVEMENT OF THE MUSCLES OF FACIAL EXPRESSION
Initially, inspect the face during conversation and rest
including:
drooping
sagging
smoothing of normal facial creases
Next, ask the patient to:
raise their eyebrows
smile showing their teeth
frown
puff out both cheeks
close both eyes tightly
When you wisp a piece of cotton on
your patient’s eyes, you are assessing
for the function of
A.CN III
B.CN IV
C.CN V
D.CN VI
HEARING*
BALANCE
Equilibrium can be tested using
the :
have the patient stand erect
with his feet close together
and his eyes closed
he might sway slightly, but
should not fall
stay close to the patient
in case he does begin to
fall
Taste and Touch at the back of the tongue
Movement of Pharyngeal muscles
Sensory to Pharynx, larynx, and viscera
Movement of palate, pharynx, and larynx
Ask the patient to and note any difficulty doing so
Next, note the quality and sound of the patient's
Ask the patient to open their
mouth wide, protrude tongue,
and
while the patient is
performing this task, flash
your penlight into the
patient's mouth
observe the soft palate,
uvula and pharynx for
symmetry
Next tell the patient you're
going to test his
use a tongue depressor or
the butt of a long Q-tip
perform this test by
touching the pharynx on
both the left and right sides,
observing the normal gag or
cough
Motor to:
Neck muscles
Upper back muscles
Place your hands on the
patients shoulders
Have him
upward while you exert slight
resistance
the strength and contraction
should be symmetrical
Next, place one hand on the
side of the and
the other on the opposite SCM
muscle
Have the patient turn his head
towards the hand on his jaw
while you apply slight
resistance
have the patient
and move it side
to side
normally, the tongue will be
protruded from the mouth and
remain midline
Note:
deviations of the tongue
from midline
a complete lack of ability to
protrude the tongue
tongue atrophy
fasciculation on the tongue
The Glasgow Coma Scale (GCS) is a neurological
scale used to assess a person’s level of
consciousness after a brain injury. It is commonly
used in emergency and intensive care settings to
evaluate the severity of brain injury based on eye
response, verbal response and motor response.
Obeys commands 6
Localizes pain 5
Withdraws to pain 4
Flexion to pain (Decorticate) 3
Extension to pain (Decerebrate) 2
None 1
N: score of 14-15 indicates optimal LOC
Abn: less than 14 – some impairment
less than 10 – emergency attention
less than 7 - coma
3 – deep coma
definition of terms (levels of consciousness):
normal; oriented
disoriented; impaired thinking and responses
people who do not respond quickly with information about their
name, location, and the time
caused by sleep deprivation, malnutrition, allergies,
environmental pollution, drugs, and infection
disoriented; restlessness, hallucinations, sometimes delusions
person may be restless or agitated
exhibit a marked deficit in attention
sleepy
shows excessive drowsiness
responds to stimuli only with incoherent mumbles or
disorganized movements
decreased alertness; slowed psychomotor responses
has a decreased interest in their surroundings, slowed
responses, and sleepiness
sleep-like state (not unconscious); little/no spontaneous activity
only respond by grimacing or drawing away from painful stimuli
cannot be aroused
noresponse to stimuli
have no corneal or gag reflex
may have no pupillary response to light
Using the Glascow coma scale, a patient is
given a score of 5. This is interpreted as
A.Deep coma
B.Some impairment
C.Coma
D.Emergency attention
Upon determining Mr. X’s level of
consciousness utilizing the Glasgow
coma scale, he flexes to pain, produces
incomprehensible words, and opens eyes
spontaneously, his score is
A.13
B.9
C.7
D.8
The deep tendon reflex is sometimes called the
stretch reflex or myotatic reflex because of the
stretch action and the muscle response
involved. Some authors argue that they are not
the same reflex. They believe the tendon reflex
occurs after the tendon's active stretching
when it is tapped with the hammer.
automatic / involuntary reaction in response to a stimulus
does NOT require conscious thought
does NOT reach higher brain centers
*use neuro hammer on your own fingers
to minimize trauma to the patient
to give the nurse better control
KNEE-JERK REFLEX /
PATELLAR REFLEX
muscles contract in
response to stretching force
applied to it
KNEE-JERK REFLEX /
PATELLAR REFLEX
If (–) or exaggerated
Brain or SC defect
muscle stretch
muscle contraction
5+: sustained clonus
4+: non-sustained clonus (repetitive vibratory movements)
3+: brisk
1+: trace, or seen only with reinforcement
0 : absent reflex
Biceps Reflex
Brachioradialis reflex
Triceps reflex
Patellar Reflex
Achilles Reflex
Plantar Reflex
N: Flexion of toes
Abn: Fanning/Babinski
Abdominal Reflex
N: Contraction
Abn: no response
May be absent in obese
clients and pregnant
Cremasteric Reflex
Which among these reflexes does not
belong to the classification of
superficial reflexes?
A.Plantar reflex
B.Patellar reflex
C.Cremasteric reflex
D.Abdominal reflex
Grade:
5/5: normal strength
4/5: movement possible against some resistance by the
examiner
3/5: movement possible against gravity, but not against
resistance by the examiner
Grade:
2/5: movement possible, but not against gravity
1/5: muscle flicker, but no movement
0/5: no contraction