Introduction Flashcards
central vs peripheral
central- brain/spinal cord
peripheral- cranial nerves, spinal nerves, sensory neurons in dorsal root ganglia, enteric nervous system, autonomic nervous system
nucleus v ganglia
groups of neurons in the central and peripheral nervous system
white v gray matter
white- myelinated
gray- cell bodies
dorsal roots v ventral roots
dorsal- sensory
ventral- motor
the cervical and lumbar enlargement cross sections show
large ventral horns w/ large gray matter- motor neurons
tract v pathway v decussation
tract- bundle of axons w/ similar function
pathway- series of tracts
decussation- site where tract crosses midline
where do sympathetic neurons arise and what NT do they use?
thoracic- norepinephrine
where do parasympathetic neurons arise and what NT do they use?
sacral and cranial- AcH
3 meninges
dura, pia, arachnoids
what produces CSF?
choroid plexus in wall of ventricles
what does CSF do?
nurition, waste removal, protection
sulci vs gyri
sulci- sink- crevasse
gyri- grow- bumps
serve to increase surface area of the brain
ware there more sulci in the front or back of the brain
front
multipolar v bipolar v unipolar
multi- motor neurons w/ many dendrites and 1 axon
bipolar- interneurons w/ 1 dendrite and axon
unipolar- DRG neuron w/ 2 axons and 0 dendrites
axon initial segment
axon hillock; generates action potential
