 | Term | Definition |
| |
continuous conduction |
signals that are conducted down unmyelinated axons :are slower |
| |
saltatory |
signals that are conducted down myelinated axons: are faster |
| |
synapse |
junction beween 2 neurons or between neuron and muscle or gland |
| |
syaptic cleft |
neurotransmitters cross this, thereby bridging the space between neurons |
| |
neurotransmitters |
classifed as either excitatory or inhibatory |
| |
acetylcholine |
stimulates muscle contraction |
| |
epinephrine |
stimulates functions of sympathetic nervous system |
| |
cranium and vertebral column |
surrounds and protects the spinal cord |
| |
cerebrospinal fluid |
circulates around the brain and spinal cord |
| |
meninges |
connective tissue around the brain and spinal cord |
| |
pia mater |
innermost layer of meninges |
| |
arachnoid |
middle layer of meninges |
| |
dura mater |
outer layer of meninges |
| |
subarachnoid |
this is the space where csf is located |
| |
100 billion |
there are this many neurons in the brain |
| |
glucose and oxygen |
the brain must have a continuous supply of this |
| |
oxygen |
deprivation of this kills brain cells in 1-2 minutes |
| |
sulci |
grooves |
| |
gyri |
elevated ridges |
| |
cerebrum |
divided into left and right hemispheres by the longitudinal fissure |
| |
corpus callosum |
large fibrous bundles that connect the hemispheres of the cerebrum: this provides communicative pathway from one hemisphere to another |
| |
functions of cerebrum |
higher functioning, language,memory,reasoning |
| |
frontal lobe |
lobe of cerebrum responsible for motor output, speech, cognition |
| |
parietal lobe |
lobe of cerbrum responsible for skin and muscles |
| |
temporal lobe |
lobe of cerebrum responsible for auditory/olfactory |
| |
occipital |
lobe of cerebrum responsible for visual function |
| |
center |
part of brain where the diencephalon is located |
| |
thalamus and hypothalamus |
2 structures housed in diencephalon |
| |
thalamus |
relay station and interpretation center for all sensory impulses except smell |
| |
hypothalamus |
regulates autonomic, nervous, and endocrine system by governing pituitary gland |
Share on Facebook
Share on MySpace