Brain Model structure + function + CSF flow

Corpus Callosum

white matter tract that connects to the L&R cerebral hemisphere

Septum Pellucidum

transparent division between the L&R lateral ventricles

Fornix

Links parts of the limbic system

thalamus & hypotalamus sulcus

receives most sensory input entering the brain

interthalamic adhesion

connects L&R thalamus

hypothalamus

controls hunger, thirst, temperature, homeostasis, emotions, hormones

Optic Chiasm

Hemidecussation of the optic nerve

Pineal Body

secretes melatonin, serotonin, maintain circadian rhythm

inferior colliculus

controls reflexive movements of the head toward auditory stimulus

superior colliculus

controls reflexive movements of the head towards visual stimuli

corpora quadrigemina

all 4 colliculi in the tectum

cerebral aqueduct

delivers CSF from the 3rd to 4th ventricle

mammillary body

bulge from the hypothalamic floor involved in reflexes related to smell

pituitary gland

regulatory endocrine gland

cerebellum: 4th ventricle

receives CSF from the cerebral aqueduct

cerebellum: arbor vitae

"tree of life", branching myelinated fibers in cerebellum

pons

ascending and descending tracts, reflexive centers

medulla oblongata

houses major vital centers

olive

houses cell bodies of neurons that provide output to the cerebellum

pyramid

contains fibers from descending upper motor neurons in the medulla

longitudinal fissure

fissure between L&R hemispheres of the brain

Cerebellum

controls balance, coordination, and muscle tone

Frontal Lobe

motor output, problem solving, personality

parietal lobe

houses somatosensation

occipital lobe

visual input, houses visual cortex

temporal lobe

auditory input, houses auditory input

central sulcus

separates frontal from parietal lobes

precentral gyrus

primary motor area for the cerebral cortex

postcentral gyrus

primary somatosensory area of the cerebral cortex

lateral sulcus

sulcus between parietal and temporal lobes

transverse fissure

fissure between cerebellum & occipital lobe

gyrus

a bump/upward mound in cortex

sulcus

a groove or depression in the cortex

olfactory bulb

houses cell bodies of second order neurons involved in sense of smell

olfactory tract

tract for sense of smell/olfaction

CSF circulation in ventricles

(2) lateral ventricles--> through intrerventricular foramen--> third ventricle -->through the cerebral aqueduct of midbrain--> fourth ventricle--> through the median and 2 lateral aperaturatures--> into the subarachnoid space of the brain and central canal of the spinal cord--> some is reabsorbed into blood through arachnoid villi, some is recirculated