spinal cord and brainstem TERMS Flashcards
SOMATIC
skin (dermis), muscles & joint structures
SOMATOTOPY
stematic mapping / representation of the body in the NS
GREY MATTER
nerve cell bodies, synapses & interneurons
NUCLEI
groups of nerve cell bodies in the CNS
GANGLIA
groups of nerve cell bodies in the PNS
WHITE MATTER
nerve fibres / axons, myelinated
COLUMN
Area of white matter in the spinal cord
TRACT / FASCICULUS
group of similar ascending or descending nerve fibres
LEMNISCUS
“ribbon”, group of homogenous axons ascending through the brainstem
cerebral peduncles
cerebrum > midbrain
pons transverse fibres
travell to cerebellum
pons : basilar sulcus
basilar artery lies here
superior cerebellar peduncle
cerebellum > midbrain
middle cerebellar peduncle
cerebellum > pons
inferior cerebellar peduncle
cerebellum > medulla oblonganta
midbrain: superior colliculi
contain nuclei for visual map and visual reflexes
midbrain: inferior colliculi
contain nuclei for auditory pathway and reflexes
open medulla
opens into 4th ventricle, 4th ventricle is placed @ its back
closed medulla
closed with central canal within its substancr
- central canal of medulla burried in it middle
Gracile tubercle
contains the gracile nucleus where the fibres of fasciculus gracilis synapse.
Cuneate tubercle
contains the cuneate nucleus where the fibres of fasciculus cuneatus synapse.