encephalo-, encephal-

1. The middle section of he embryonic (animal or human before it is born) vertebrate brain which is a highly complex organ consisting of sensory and motor systems that constitutes part of the nervous system.

The vertebrate brain is in all of the brain systems that are found in mammals and occur in birds, reptiles, and amphibians, as well as in fish and sharks.
2. The part of the brain developed from the middle cerebral vesicle (hollow organ in the body containing fluid) and consisting of the tectum (part in the body that forms a covering; especially, the back upper section of the midbrain) and cerebral peduncles (neurons joining different parts of the brain), and traversed by the cerebral aqueduct.

The cerebral aqueduct is a narrow opening in the brain that connects the third ventricle with the fourth ventricle, allowing cerebrospinal fluid to flow between these two areas.

Ventricles are openings in the brain that provide a pathway for cerebrospinal fluid is the cushiony fluid that protects the brain and spine from trauma.

The cerebral aqueduct drains cerebrospinal fluid from the third ventricle to the fourth ventricle where the third ventricle is a narrow, four-sided, irregularly shaped opening in the middle of the brain.

The fourth ventricle is a wide, flat open space located in the back bottom part of the brain.

Surgical incision of the spinothalamic tract in the mesencephalon, formerly used to control intractable pain, now in disuse because of resulting dysesthesia.

1. The anterior part of the embryonic hindbrain, which gives rise to the cerebellum and pons.
2. The cerebellum and pons of the adult brain.

A reference to the spinal cord and the brain.

Inflammation of the spinal cord and the brain.

Encephalomalacia or softening of the brain.

A rarely used term for cerebellum.

1. Embryonal carcinoma.
2. An obsolete (out dated) term for soft tumor of the testis.

Encephalitis resulting from otitis media (inflammation of the middle ear).

A diffuse inflammation of the brain affecting both the gray and white matter of the brain, resulting in the progressive loss of all the mental and motor functions: Panencephalitis is a rare form of chronic progressive brain inflammation caused by measles virus which primarily affects children and young adults.

1. A disease characterized by inflammation of the gray matter of the brain.
2. Poliomyelitis affecting the cerebrum.
3. An acute infectious inflammation of the brain's gray matter, either of the cortex or of the central nuclei.

A neurologic disease of ruminant animals deficient in thiamin. Edema and softening and necrosis of the gray substance of the cerebral cortex are the primary manifestations.

Inflammation of the gray matter of the brain and the spinal cord, associated with inflammation of the meninges.

Inflammation of the gray matter of the brain and spinal cord.

Any pathologic process or disorder of the gray substance of the brain: In his medical studies, Jeff learned that polioencephalomyelopathy was a disease that related to the function predominantly involving the neurons rather than the glia or white matter of the brain and spinal cord.