CNS

forebrain structures, midbrain, hindbrain and histology of neuron

Cerebrum

***The brain; "big brain"

Cerebral Cortex

***Superficial gray matter of the cerebrum

Parietal Lobe

Occipital Lobe

Temporal Lobe

Frontal Lobe

Longitudinal Fissure

***

Lateral Sulcus

***Fissure

Central Sulcus

Precentral Gyrus

On the frontal lobes

Postcentral Gyrus

On the parietal lobes

Cerebellum

***The "little brain"

Midbrain

***

Pons

***

Medulla Oblongata

***

Arbor Vitae

***

lateral ventricle

either of two horseshoe-shaped ventricles one in each cerebral hemisphere; they communicate with the third ventricle via the foramen of Monro

parieto-occipital sulcus

Pineal gland

Third ventricle

olfactory

purely sensory; carries impulses or the sense of smell

optic

purely sensory; carries impulses for vision

oculomotor

supplies motor fibers to direct the eyeball; to the eyelid; and to the internal muscles controlling lens shape and pupil size

trochlear

supplies motor fibers for one external eye muscle (superior oblique)

trigeminal

conducts sensory impulses from the skin of the face and mucosa of the nose and mouth; contains motor fibers that activate chewing

abducens

supplies motor fibers to the lateral rectus muscle, which roles the eye laterally

facial

activates the muscles of facial expression, carries sensory impulses from the taste buds of anterior tongue

vestibulocochlear

transmits impulses fro the sense of balance as a well as the cochlear branch that transmits impulses for the sense of hearing

glossopharygeal

carries sensory impulses from pharynx (swallowing) and taste on one-third side of tongue (IX)

vagus

carries sensory impulses from and motor impulses to the pharynx, larynx, and the abdominal and thoracic viscera

Spinal accessory

mostly motor fibers that activate the sternocleidomastoid and trapezius muscles

hypoglossal

motor fibers control tongue movements; sensory fibers carry impulses from the tongue

Midbrain: oculomotor nerve (CN III)

superior colliculus

an essential visual center between the retina and the striate cortex

inferior colliculus

an essential auditory center in the midbrain

cerebral aqueduct

a canal connecting the third and fourth ventricles

transverse cerebral fissure

cerebellar hemisphere

either of two lateral lobes of the cerebellum

Arbor vitae

Blue

vermis

the narrow central part of the cerebellum between the two hemispheres (yellow)

folia (gray matter)

Leaf like

purkinje cell

a large densely branching neuron that is the characteristic cell of the cerebellar cortex

4th ventricle

Blue

Central canal

Red

Ventricles

Gray matter CNS

short non myelinated neurons - synapses occur

White matter

No neuron cell bodies - axons ascend from spinal cord to brain to communicate

Neuron Cell Body

Dendrites

Axons

pyramidal cells