brain, nerves, spinal cord functions Flashcards
cerebral aquaduct
connects 3rd and 4th ventricle part of midbrain
optic tracts
relay info from optic chiasma to parts in brain
infundibulum
passageway for hormones from pituitary gland
olfactory bulbs
sensory input and output
olfactory tracts
signal transmitted down the tracts and end in primary olfactory area of temporal lobe
optic nerves
transfer visual info from retina to the vision centers of the brain via electrical impulses
optic chiasma
connects brain to the eye
pituitary gland
produce critical hormones
thalamus
relay motor and sensory signals to cerebral cortex
hypothalamus
link nervous system to endocrine system via pituitary gland
mammillary bodies
relay stations in olfactory passageways
brain stem
controls flow of message between brain and rest of the body
pons
relay signals from forebrain to cerebellum (helps w breathing, sleeping, facial expressions)
medulla oblongata
controls autonomic nervous system
cerebellum
controls voluntary movements such as posture and balance
2 hemispheres
left - controls right side of body, logic tasks (science)
right - left side of body, tasks of creativity
cerebral cortex
where most info processing occurs, divided into 4 lobes
vermis
muscle tone for posture and locomotion
arbor vitae
brings sensory and motor info to and from the cerebellum
lymbic system
deals w emotion and formation of memories
cingulate gyrus
functions in emotion and behavior
hippocampus
memory and spatial navigation
frontal lobe
motor functions, planning, reasoning, judgement
parietal lobe
sensory info - taste, temp, touch
temporal lobe
processing auditory info from the ear
occipital lobe
visual processing info center
corpus callosum
connects the 2 hemisphere to help communicate and coordinate
fornix
connects hippocampus to mammillary body and thalamus
basal ganglia
helps w motor functions
lateral ventricles
contains fluid that helps cushion the brain
diencephalon
controls many autonomic functions, relays sensory info between the brain
anterior median fissure
divides the spinal cord into symmetrical halves
posterior median fissure
separates posterior funiculi and the external boundary of posterior median septum
central canal
structure w/in spinal cord that holds the spinal cord and nerves
ventral gray horns
contains motor neurons that deal w the muscle activity
dorsal grey horns
sensory relay neurons that receive info from the periphery
I: olfactory
afferent, smell
II: optic
afferent, vision
III: oculomotor
efferent, eyeball and eyelid movement
IV: trochlear
efferent, move eyeball down and laterally
V: trigeminal
mixed, chewing face/mouth
VI: abducens
efferent, turns eyeball laterally
VII: facial
mixed, facial expressions and taste receptors
VIII: vestibulocochlear
afferent, hearing
IX: glossopharyngeal
mixed, senses carotid blood pressure
X: vagus
mixed, slows heart rate
XI: spinal accessory
mixed (primary efferent), controls trapezius and sternocleidomastoid
XII: hypoglossal
mixed (primary efferent), controls tongue movement