Transcript PERIPHERAL NERVOUS SYSTEM

NERVOUS SYSTEM
« Central Nervous
System
« Peripheral Nervous
System
« Brain
« Spinal Cord
« Cranial Nerves
« Spinal Nerves
PERIPHERAL NERVOUS
SYSTEM
Nerves from the central nervous
system that connect it to other body
parts
CRANIAL NERVES
Nerves of the head and neck
Cranial Nerves
* 12 Pairs
* Arise from brain stem
* Motor and sensory
functions
* IDENTIFY NERVE
* DESCRIBE FUNCTION
* REVIEW HOW TO EVALUATE
FUNCTION
Equipment for Examination
CN 1 Olfactory
* Sensory reception
and interpretion of
smell
EVALUATION
* Test each nostril separately(one occluded)
* patients eyes closed
* use a couple of odors
* begin with least irritating(soap,lotion,food)
CN1
CN 2 Optic
Sensory
- Vision
EVALUATION
* Test each eye separately using letter chart
for visual acuity
* Peripheral vision - each eye separately
using finger
* Exam of external eye for pathology
CN 2
CN 3 Oculomotor
MOTOR: Pupil constriction
Raise eyelids
Extraocular movements
CN 4 Trochlear
MOTOR
downward movement of eye
smallest cranial nerve
CN 6 ABDUCENS
MOTOR: Lateral eye movement
Evaluation of CN 3,4,6
EYE MOVEMENT
CN 3
Pupil Constriction
CN 5 Trigeminal
Motor: movement of
mandible
Sensory: 3 divisions
sensation to
face and head
CN 5
MOTOR
EVALUATION
CN 5
SENSORY
EVALUATION
CN 7
* MOTOR: facial expression
* SENSORY: anterior 2/3 of tongue
CN 7
MOTOR
EVALUATION
CN 7
SENSORY
EVALUATION
CN 8
ACOUSTIC
SENSORY - Hearing
CN 8 EVALUATION
CN 9
GLOSSOPHARYNGEAL
MOTOR: Movement of soft palate
SENSORY: gag reflex
taste posterior 1/3 of tongue
CN 9 SENSORY
CN 10
VAGUS
MOTOR: Swallowing
SENSORY: Sensation around ear
CN 10 EVALUATION
SAME EVAL. AS CN 9: gag reflex
swallow water
CN 11 SPINAL ACCESSORY
MOTOR: Head, neck,shoulder,
movement
CN 11 EVALUATION
CN 12 HYPOGLOSSAL
MOTOR: Tongue movement
CN 12 EVALUATION
RECORDING FINDINGS
UKCD