forebrain Flashcards
consists of
cerebral hemispheres
diencephalon
diencephalon consists of
thalamus
hypothelamus
epithalamus
subthalamus
thalamus
major relay for sensory info to cortex
hypothalamus
regulates homeostasis and influences hormone release
epithalamus
influences sleep and wakefulness through pineal gland
subthalamus
influences motor activity through inhibition of undesired movement
hypothalamus is ___to brainstem
rostral
hypothalamus regulates homeostasis by
influencing pituitary gland
regulating food and water intake
regulating sleep wake cycle
regulating parasympathetic and sympathetic NS
hypothalamus extends from ___ anteriorly and ___ posteriorly
optic chiasm and mamillary bodies
thalamus
major sensory relay
all sensory info on way to cerebral cortex(except olfactory nerve) synapses and travels through thalamus
cerebral hemisphere grooves and folds
sulci and gyri
gray matter in brain
cerebral cortex( follows grooves and folds) and deep nuclei
white matter
most of volume of cerebral hemispheres
3 types of fibers
projection fibers
sensory connections coming from brainstem and spinal cord synapsing on thalamus
motor connections descending from cerebral cortex to brainstem and spinal cord
association fibers
connections within lobes or one lobe to another
commissural fibers
connections between hemispheres
frontal lobe function
cognition, decision making, judgement, voluntary movement(primary motor cortex)
parietal lobe function
touch (somatosensory cortex) proprioception
occipital lobe function
vision(primary visual cortex)
temporal lobe function
auditory, olfactory, fear response (amygdala), learning(hippocampus)
frontal lobe bordered by
central sulcus and lateral fissure
precentral gyrus in frontal lobe contains
primary motor cortex that controls execution of movement
parietal lobe bordered by
central sulcus and lateral fissure
posterior border is less well defined
post central gyrus in parietal lobe
contains the main receptive area for sense of touch and a somatosensory map
occipital lobe bordered by
preoccipital notch
temporal lobe bordered by
laateral fissure and preoccipital notch
transverse temporal gyri in lateral sulcus
audition
insular cortex in lateral sulcus
pain and taste
deep nuclei part of basal ganglia
globus pallidus
caudate
putamen
amygdala
deep nuclei involved in fear response and emotional memory
internal capsule
white matter tract
Includes axons relaying sensory info from thalamus to cerebral cortex and axons relaying motor signals to motor neurons from the cerebral cortex to lower levels