Cranial Nerves & Spinal Tracts Flashcards
CN I
Olfactory
- Smell
- SENSORY
CN II
Optic
- vision
- SENSORY
CN III
Oculomotor
- Eye movements (up, down, in)
- Constrict pupil
- MOTOR
CN IV
Trochlear
- Eye movement (adduct, down)
- MOTOR
CN V
Trigeminal
- Sensory: facial sensation, cornea
- Motor: chewing
CN VI
Abducens
- Eye movement (abduct)
- MOTOR
CN VII
Facial
- Motor: Facial expressions, close eyes,
saliva and tears
- Sensory: Taste (anterior 2/3 tongue)
CN VIII
Vestibulocochlear
- Vestibular nerve: equilibrium and balance
- Cochlear nerve: hearing
- SENSORY
CN IX
Glossopharyngeal
Sensory: Taste (posterior 1/3 tongue)
Motor:
- Pharynx control
- swallowing
- saliva
- soft palate rising with “ah” sound
- aids in reflex control of BP
- respiration
- gag reflex
CN X
Vagus
- MOTOR & SENSORY
- Slows HR and visceral activity (mostly
parasympathetic fibers)
- larynx control, lungs, bronchi
- heart
- stomach, small intestine, gall bladder
- voice production
CN XI
Accessory
- MOTOR
- Shoulder shrug (traps)
- SCM
CN XII
Hypoglossal
- MOTOR
- Motor function of tongue
Lateral Spinothalamic
- SENSORY
- pain, temp, crude touch on opposite side
Anterior Spinothalamic
- SENSORY
- Crude touch and pressure
Fasciculi gracilis & cuneatous
- SENSORY
- Discriminating touch and pressure sensations (vibration, stereognosis, 2-point discrimination)
- Conscious kinesthesia