SDSU BIOL212 UNIT 4 LECTURES

CN I (1)

olfactory

olfactory

sensory - smell

motor - none

CN II (2)

Optic

optic

sensory - vision

motor - none

CN III (3)

oculomotor

oculomotor

sensory - none

motor (somatic) - skeletal eye muslces

motor (visceral) - smooth eye muscles (parasympathetic)

CN IV (4)

trochlear

trochlear

sensory - none

motor - skeletal eye muscles

CN V (5)

trigeminal

trigeminal

sensory - general sensation from face , eyes , mouth

motor (somatic) - skeletal muscles of mastication

CN VI (6)

Abducens

abducens

sensory - none

motor (somatic) - skeletal eye muscles

CN VII (7)

Facial

facial

sensory - taste - ant. tongue

motor (somatic) - muscles of facial expression

motor (visceral) - salivary glands (parasympathetic)

CN VIII (8)

Vestibulocochlear

vestibulocochlear

sensory - hearing & equilibrium

motor - none

CN IX (9)

glossopharyngeal

glossopharyngeal

sensory - taste - post tongue, mid ear and throat, bp and gas content

motor (somatic) - swallowing muscles

motor (visceral) - salivary gland (parasympathetic)

CN X (10)

Vagus

vagus

sensory - general thoracic and abdominal viscera

motor (somatic) - larynx and swallowing muscles

motor (visceral) - thoracic and abdominal viscera (parasympathetic)

CN XI (11)

accessory

accessory

sensory - none

motor (somatic) - swallowing muscles, sternocleiodmastoid, and trapz 

CN XII (12)

Hypoglossal

hypoglossal

sensory - none

motor - tongue muscles

Reflex Arch tracing

1. Receptor

2. Afferent sensory neuron

3. interneuron

4. motor effector neuron

5. effector

general somatic motor tract (tracing)

• motor cortex (frontal lobe)

• internal capsule

• mesencephalon

• pons

• medulla

• ant. horn

• ant. root

parts of the brainstem

• mesencephalon

• pons

• medulla oblongata

sympathetic

fight / flight

parasympathetic

rest / digest

central nervous system

brain & spinal cord

• sensory (afferent)

• motor (efferent)

peripheral nervous system

sensory (afferent)

motor (efferent)

peripheral sensory divison

somatic

visceral

peripheral sensory somatic sensory

body walls

bones

muscles

peripheral sensory visceral sensory

organ sensation

bp , o2 , pCO2, etc

peripheral motor divison

somatic

viceral

peripheral motor somatic division

skeletal muscle only

peripheral motor visceral division

automatic ns