Nervous system anatomy Flashcards
Which glia functions in the CNS
microglia, astrocytes and oligodendrocytes, ependymal cells and polydendrocytes
which glia functions in the PNS
schwann cells
Which glia has immune function
microglia
which glia is a stem cell
polydendrocytes
function of ependymal cells
protect brain from infection and block drugs getting into brain
how many pairs of cranial nerves
12
how many pairs of spinal nerves and what are they
31, 8 cervical, 12 thoracic, 5 lumbar, 5 sacral and 1 coccygeal
what are neural fibres organised in
fascicles
dorsal root and ventral root join to form what
intervertebral foramen and branch into dorsal ramus and ventral ramus
what is plexuses
networks of intersecting spinal nerves
damage to sensory inputs leads to
paraesthesias - abnormal sensation (numbness, sensation)
damage to motor output leads to
paralysis - loss of muscle contraction
what does grey matter consists of
neuronal cell bodies, dendrites, unmyelinated axons and glial cells
what does white matter consists of
myelinated axons organised in columns - funiculi, posterior, lateral and anterior
what do thalamus and hypothalamus make up
diecenphalon