Lab 7: Nerves, Brain, & Spinal Cord

1-12: Cranial Nerves

Olfactory

I, smell

Optic

II, Vision

Oculomotor

III, Controls superior, inferior, medial rectus, and inferior oblique muscles moving the eye and controls lens shape

Trochlear

IV, controls superior oblique eye muscle

Trigeminal

V, Major sensory nerve of face; Controls muscles in mastication (chewing)

Abducens

VI, controls lateral rectus muscle of eye

Facial

VII, controls muscles of facial expression; sense of taste

vestibulocochlear

VIII, sense of equilibrium & hearing

glossopharyngeal

IX, controls pharyngeal muscles and salivary glands; sense of taste

Vagus

X, largest parasympathetic nerve

Accessory

XI, controls neck muscles

Hypoglossal

XII, controls muscles of tongue

cerebrum

conscious brain

gyri

ridges

sulci

the grooves

cerebellum

coordinates muscle movements; muscle memory

transverse cerebral fissure

separates cerebrum and cerebellum

pons

the bridge that links medulla oblongata to thalamus

medulla oblongata

houses autonomic centers

pituitary gland

master gland of endocrine system

cerebral cortex

this grey matter contains neuron cell bodies; site of the conscious mind

white matter

contains bundles of myelinated axons called “tracts” in CNS

corpus collosum

connects left and right brain hemispheres

thalamus

gateway/relay station to/from cerebral cortex

hypothalamus

controls pituitary gland and vital autonomic centers of medulla oblongata

choroid plexus

produces cerebrospinal fluid

lateral ventricle

contains cerebrospinal fluid

pineal gland

controls sleep/wake cycles

corpora quadrigemina: inferior colliculi

auditory reflexes

corpora quadrigemina: superior colliculi

visual reflexes