Medical Glossary

Calamus Sciptorius

Arantius' ventricle, inferior part of the rhomboid fossa; the narrow lower end of the floor of the fourth ventricle of the brain. It is shaped like a pen and lies between the restform bodies.

Caudal

Toward the end of the spine.

Central Nervous System (CNS)

The part of the nervous system consisting of the brain and spinal cord which coordinates the entire nervous system of the body.

Cerebellar Cortex

The outer layer of the cerebellum.

Cerebellar Speech

Abnormal speech patterns seen in people who have a disease of the cerebellum; a slow, jerky, and slurred speech that may come and go or it may be unvaried in pitch.

Cerebellar Tonsils

Two bulges at the bottom of the cerebellum.

Cerebellomedullary

Refers to the area where the cerebellum and the medulla are in the brainstem.

Cerebellum

Portion of the brain that lies in the posterior fossa and coordinates skeletal muscle movement.

Cerebral Aqueduct

A narrow conduit (tube), between the third and the fourth ventricles; located in the midbrain. CSF moves from the third ventricle through the cerebral aqueduct to the fourth ventricle.

Cerebral Cortex

The outer layer of the cerebrum.

Cerebral Hemisphere

One of the large, paired structures that together constitute the cerebrum of the brain.

Cerebral Spinal Fluid (CSF)

Fluid that occupies the ventricles of the brain, subarachnoid space of the meninges, and the central canal of the spinal cord.

Cerebrum

Portion of the brain that occupies the upper part of the cranial cavity.

Choroid Plexi

A network or interjoining; a vascular proliferation or fringe of the tela choridea (the pia mater brain membrane which covers part of the roof of the fourth ventricle) in one of the cerebral...

Choroid Plexus

Mass of specialized capillaries that lines the ventricles in the brain; these capillaries secrete cerebral spinal fluid.

Chronic

Long lasting; a disease having a long course; not acute.

CINE MRI

A test that is done in the MRI scanner that looks at the flow of CSF around the cerebellum and into the spinal canal.

Cisterna Magnum

A cavity, a dilation of the subarachnoid space which is located between the cerebellum and the medulla. It receives CSF from the fourth ventricle via the medial foramen of Magendie.

Clonus

A series of alternating muscle contractions and partial relaxations that produce a convulsive spasm.

CM

Chiari malformation.

Coele or Cele

Related to a cavity or space; refers to swelling tumor protrusion.

Congenital

Existing at birth; usually refers to certain mental or physical traits, peculiarities, or diseases; is a more general term than hereditary since congenital includes conditions due to influences...

Contraindicated

A medication or procedure that is not advisable. i.e., tetracycline is contraindicated during pregnancy.

Contrast

The difference between two areas in an image; it enables the radiologist to see details.

Conus medullaris

The lowest end of the spinal cord.

Cranial nerves

The 12 nerves of the brain that control motor and sensory functions, including swallowing, heart rate, eye movement and smell.

Craniectomy

The excision (removal) of part of the skull.

CSF

Cerebral spinal fluid.

CT scan

A specialized x-ray that takes images around the body that are reconstructed by a computer to give a more detailed image than a standard x-ray.

Cyanosis

Blue or purple color to the skin and mucous membranes caused from not having enough oxygen in the blood.
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