CNS Flashcards
what are the parts of the hindbrain
medulla oblongata, cerebellum, and pons
function of the midbrain
sensory signals and orchestrates responses to signals
parts of forebrain
cerebrum, thalamus, hypothalamus
what is the cerebral cortex
thin layer of gray matter covering the cerebrum
function of frontal lobe
short term and working memory ad information processing , decision making, planing and judgment
function of parietal lobe
sensory input , spatial positioning of the body
function of occipital lobe
visual input, processing and output
function of temporal lobe
uditory input, processing, and output
function of cerebellyum
processing and storying of implicit memories, also automatic responses (involuntary)
function of the brain stem
respiratory, digestive and circulatory functions
parts of the brain stem
midbrian, medulla oblongata, and pons
what does the ANS control
internal organs, blood vessels, smooth muscle tissue, and glands
what directs the ANS
the hypothalamus
what does the somatic nervous system control
the five senses and voluntary movement of muscle
Direction of Efferent nerves
bring signals from CNS to organs and muscles
direction of afferent nerves
bring signals from organs and muscles to CNS
describe reflex arc
stimulus hitting tendon, then the muscle contracts which jerks the foot. Stimulus is detected by sensory receptors which send a message to the sensroy neuron and then to interneurons. Interneurons transmit the message to a motor neuron which causes the muscle to contract. The reflex does not even go up to the brain, just through the spinal cord
when do action potentials happen
when the neuron is stimulated past the necessary threshold
what happens with a chemical synapse
a neurotransmitter is released to affect the adjoining cell
what are the gaps between the myelin sheaths called
nodes of ranvier
what are the axons insulated by
oligodendrocytes and the myelin sheath
