4 Anatomy of the Nervous System Flashcards
brain and the spinal cord
central nervous system
nerves outside the brain and spinal cord
peripheral nervous system
part of the peripheral nervous system is the _________
consists of axons conveying messages from sense organs to the CNS and from the CNS to the muscles
somatic nervous system
controls the heart, intestines, and other organs
consists of:
sympathetic nervous system
parasympathetic nervous system
autonomic nervous system
network of nerves that prepare organs for vigorous activity
“fight or flight”
use norpinephrine
sympathetic nervous system
facilitates vegetative, nonemergency responses
release acetylcholine
parasympathetic nervous system
consists of the medulla, pons, and cerebellum
hindbrain
enlarged extension of spinal cord, controls come vital reflexes through cranial nerve
medulla
contributes to control of movement, balance and coordination
helps shift attention back and forth between auditory and visual stimuli
cerebellum
brains three major divisions
hindbrain,midbrain, forebrain
consists of left and right hemispheres
outer portion is the cerebral cortex
forebrain
interlinked structures that form border around brainstem
important for motivations and emotions
consists of olfactory bulb, hypothalamus, hippocampus, amygdala, cingrulate gyrus of cerebral cortex
limbic system
consists of thalamus and hypothalamus
diencephalon
most sensory goes here first, its processed and sent to cerebral cortex
except smell
thalamus
has widespread connections with rest of forebrain and the midbrain
conveys messages to pituitary gland, altering its release of hormones
hypothalamus
