Spinal Cord and PNS Review Flashcards
What is the role of white matter in the spinal cord?
Conveys sensory info up to the brain and motor commands down from the brain
What kind of fibers does information from the periphery travel through?
Afferent
Where does information enter the spinal cord?
Dorsal
What kind of fibers does information leaving the spinal cord travel through?
Efferent
Information about motor commands leaves the spinal cord through the…
Ventral
What is a segment of skin associated with a spinal nerve called?
Dermatome
How many cranial nerves are there?
12
How many pairs of spinal nerves are there?
31
With what disease do you see dermatomes?
Shingles
Where do the cranial nerves enter/exit
Brainstem
What is contained within the dorsal root ganglion?
Cell bodies of sensory neurons
Are your cranial nerves autonomic, somatic, or both?
Mostly somatic
Give an example of how the sympathetic and parasympathetic nervous systems work unopposed?
Sweat glands and limbs
Give an example of how the sympathetic and parasympathetic nervous systems work opposite?
Gut motility and heart rate
Give an example of how the sympathetic and parasympathetic nervous systems work together?
Male sexual functions
Is the stretch reflex monosynaptic or polysynaptic?
Monosynaptic
Is the withdrawal reflex monosynaptic or polysynaptic?
Polysynaptic
In the Parasympathetic Nervous System do the organs work together or independent of one another?
Independent of one another
In the Sympathetic Nervous System do the organs work together or independent of one another?
All together
What neurotransmitter(s) is released in the Parasympathetic Nervous System?
Acetylcholine
What neurotransmitter(s) is released in the Sympathetic Nervous System?
Acetylcholine and Norepinephrine
What is gray matter in the spinal cord?
Cell bodies and interneurons
