Introduction and organization of the nervous system Flashcards
Major divisions of PNS anatomically
cranial and spinal nerves and associated ganglia
number of pairs of spinal nerves
31 pairs
Hindbrain comprises of
medulla oblongata, pons and cerebellum
the cerebellum is connected to the midbrain by
superior cerebellar peduncles
the narrow cavity of the midbrain which connects the 3rd and 4th ventricle
cerebral aqueduct
The largest masses of gray matter are found in the interior of the cerebellum
Dentate nucleus
Opening between the third and the lateral ventricles
interventricular foramen
Important masses of gray matter are deeply situated in the white matter in the cerebrum
gray cerebellar nuclei,caudate,lentiforn nuclei
number of cervical spinal nerve pairs
8
filum terminale is a prolongation of
pia mater
motor roots of the spinal nerve are also called
anterior nerve, efferent
Serves as a conduit for ascending and descending nerve fibers, collection of neurons in the medulla oblongata
nuclei
major divisions of forebrain
cerebrum and diencephalon
Hypothalamus is Dorsally or ventrally located in diencephalon
ventral
the longitudinal fissure of the cerebrum projects the
falx cerebri
tailed shaped nucleus situated on the medial of the internal capsule
caudate nucleus
neural plate formation takes place during which week of development
third week
fusiform swellings on the posterior root of each spinal nerve
sensory ganglia
neural crest cells give rise to
posterior root ganglia, sensory ganglia of the cranial nerves, autonomic ganglia, cells of the suprarenal medulla, melanocytes
subdivisions of the prosencephalon (forebrain)
telencephalon, diencephalon
The subarachnoid space is enlarged at
cisterna magna and chiasmatic cistern
