Units 1, 2, and 3 Flashcards
The two components of the Central Nervous System?
Brain (encephalon)
Spinal Cord
how many cranial nerve pairs are in the PNS?
12 cranial pairs
How many spinal nerve pairs are in the PNS?
31 spinal nerve pairs
what and where are the Ganglia?
Groups of neuron cell bodies clustered together in the PNS
The amount of CSF produced in one day?
0.5L
Which part of the lateral ventricle lacks a choroid plexus?
Frontal cornu
How many nerve trunks carry preganglionic autonomic neurons away from the spinal cord?
6
The rhombencephalon first forms during which embryonic week?
week 5-6
Arachnoid mater is continuous with which layer at the IVF?
perineurium
Chromatolysis is a process that involves which neuron structure?
Nissl substance
List functions of astrocytes?
structural support, scar formation, glycogen storage
CSF within the subarachnoid space of the vertebral canal generally ascends into what cistern?
pontine
The pineal gland protrudes into what cistern?
ambiens
Denticulate ligaments form from what?
Pia mater
what are the openings/tubes associated with the fourth ventricle?
cerebral aqueduct, central canal, right foramen of luschka, median foramen of Magendie
which vessel is most often associated with pulsating cephalgia?
middle meningeal artery
The dura mater fuses to the coccyx via what specific extension?
Filum terminale externum
A third ventricle develops within which secondary brain vesicle?
diencephalon
which type of oligodendrocyte forms most of the myelin inside the CNS?
interfascicular oligodendrocytes
Retrograde intraneuronal movements of chemicals within a neuron are characteristics of what phenomena?
axoplasmic transport
where are neurohormones synthesized?
in the hypothalamus
how long can a process be?
a few microns to 40 inches or a few feet
what are the 4 reasons for lack of success in CNS sprouting?
blood capillary permeability changes
excessive glial cell scarring
if it reaches the old target it finds competition for reattachment.
possible allergic reactions
what are the common neurohormones?
ADH (vasopressin)
Oxytocin
Releasing Factor Neurohormones