Nervous System Quiz Flashcards
cerebral hemispheres (cerebrum)
- Paired left and right hemispheres
- Surface made of ridges (gyri) and grooves (sulci)
Lobes of the Cerebrum
Deep fissures separate the lobes
Somatic Sensory Area
-Impulses from receptors (except special senses) are interpreted here
-Allows you to recognize:
~Pain
~Coldness
~Light touch
Primary motor area
allows us to move our skeletal muscles
Broca’s Area
- allows you to “say” words
- Higher intellectual reasoning
Speech area
allows you to sound out words
Cerebral white matter
- Deep in cerebrum
- Composed of fiber tracts that carry impulses to and from cortex
Corpus callosum
- Large fiber tract area between cerebral hemispheres
- Allows them to communicate with each other
Gray matter
regulates voluntary motor activities
Diencephalon
consists of three parts:
- thalamus
- hypothalamus
- epithalamus
thalamus
- relay station for sensory impulses
- transfer to correct location for interpretation
hypothalamus
autonomicnervoussystemcenter
regulatesbodytemp,waterbalance,regulatesmetabolism,
pleasurecenter,thirst,appetite,sex,pain
partoflimbicsystem(emotions)
regulatespituitarygland(locatedunderneathit)
mammillarybodies-reflexcentersinvolvedinolfactionbulgefromthefloorposterior topituitarygland
epithalamus
-forms roof of third ventricle
-houses the pineal body (endocrine gland)
-Secretes melatonin (aids in sleep)
-includes choroid plexus forms cerebral
spinal fluid
brain stem
attaches to spinal cord
-three areas (midbrain, pons, medulla oblongata)
midbrain
made of tracts of nerve fibers
cerebral aqueduct
canal that travels through the midbrain and connects the third and fourth ventricles
pons
controls breathing
Medulla Oblongata
Functions as an important control center: • heart rate • breathing • blood pressure regulation • swallowing • vomiting
Reticular formation
motor control of visceral organs
plays role in sleep/awake cycles consciousness
Cerebellum
involunary coordination of body movements
times skeletal muscle, controls balance and equilibrium
