CNS Flashcards
(24 cards)
what is the CNS
brain and spinal cord
what is the PNS
motor nerve fibers
what is somatic NS
motor: control of skeletal muscles
sensory: skeletal muscle and skin through somatic sensation
what is autonomic NS
organs, cardiac and smooth muscles, glands and adipose tissue
what is the afferent pathway
sensory branch
what is the efferent pathway
motor branch
what are some of the sensors of the afferent pathway?
- free nerve endings
- pacinian corpuscle
- meissners corpuscle
- muscle spindle
- kinesthetic receptor
- or skin
where do the sensory neurons enter through the spinal cord?
dorsal root
where do motor neurons leave through the spinal cord?
ventral root
the dorsal columns and spinothalamic tract contains what type of axons
sensory axons
the corticospinal tract contains what type of axons
motor axons
what are the 6 parts of the brain
- Cerebrum (cortex and basal nuclei)
- Diencephalon (hypothalamus and thalamus)
- Midbrain
- Pons
- Medulla Oblongata
- Cerebellum
the hypothalamus and thalamus are a part of what part of the brain
diencephalon
the cerebral cortex and basal nuclei are a part of what part of the brain?
cerebrum
what does the frontal lobe of the cerebrum do
premotor and primary motor cortex, prefrontal cortex, broca’s area
what does the parietal lobe of the cerebrum do
primary sensory, and primary gustatory
what does the temporal lobe of the cerebrum do
primary auditory, primary olfactory, wernicke’s area
what dos the occipital lobe of the cerebrum do
primary visual
what allows for intercommunication between hemispheres
corpus callosum
where is the brocas area located and what does it do and what is the path
frontal lobe
production of speech
primary auditory area –> wernickes area –> brocas area –> motor cortex
where is wernickes area located and what does it do and what is its path
temporal lobe
comprehension of speech
primary visual –> wernickes area –> brocas area –> motor cortex
what is the prefrontal association area
- decreases aggressivenss and inappropriate social responses
- progress towards a goal
- working memory/recall information
what does the basal nuclei include:
caudate nucleus
putamen
globus pallidus
subthalamic nucleus
what two pathways does the basal nuclei form and what do they do
direct and indirect pathways
indirect inhibits, direct increases activation of the frontal love and cause motor movement
