3 Structure Of The Nervous System Flashcards
Anterior
With respect to the central nervous system, located near or toward the head.
Neuraxis
An imaginary drawn through the center of the length of the central nervous system, from the bottom of the spinal cord to the front of the forebrain.
Posterior
With respect to the central nervous system, located near or toward the tail.
Rostral
“Toward the beak”; with respect to the central nervous system, in a direction along the neuraxis toward the front of the face.
Caudal
“Toward the tail”; with respect to the central nervous system, any direction along the neuraxis away from the front of the face.
Dorsal
“Toward the back”; with respect to the central nervous system in a direction perpendicular to the neuraxis toward the top of the head or the back.
Ventral
“Toward the belly”; with respect to the central nervous system, in a direction perpendicular to neuraxis toward the bottom of the skull or the front surface of the body.
Lateral
For the side of the body, away from the middle.
Medial
Toward the middle of the body, away from the side.
Ipsilateral
Located on the same side of the body.
Contralateral
Located on the opposite side of the body.
Cross section
With respect to the central nervous system, a slice taken at right angles to the neuraxis.
Frontal section
A slice through the brain parallel to the forehead.
Horizontal section
A slice through the brain parallel to the ground.
Sagittal section
A slice through the brain parallel to the neuraxis and perpendicular to the ground.
Midsagittal plane
The plaintiff X is perpendicular to the ground; divides the brain into two symmetrical halves.
Meninges
The three layers of tissue that incase the central nervous system: the dura mater, arachnoid membrane, and pia mater.
Dura mater
The outermost of the meninges; tough and flexible.
Arachnoid membrane
The middle layer of the meninges, located between the outer dura mater and inner pia mater.
Subarachnoid space
The fluid-filled space that cushions the brain; located between that arachnoid membrane and the pia mater.
Cerebrospinal fluid (CSF)
A clear fluid, similar to blood plasma, that fills the ventricular system of the brain and the subarachnoid space surrounding the brain and spinal cord.
Ventricle
One of the hollow spaces within the brain, filled with cerebrospinal fluid
Lateral ventricle
One of the two ventricles located in the center of the telencephalon.
Third ventricle
The ventricle located in the center of the diencephalon.