cerebral hemisphere (redirected from Brain hemisphere)

hemisphere /hemi·sphere/ (hem´ĭ-sfēr) half of a spherical or roughly spherical structure or organ.

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cerebellar hemisphere  either of two lobes of the cerebellum lateral to the vermis.

cerebral hemisphere  one of the paired structures forming the bulk of the human brain, which together comprise the cerebral cortex, centrum semiovale, basal ganglia, and rhinencephalon, and contain the lateral ventricles.

dominant hemisphere  that cerebral hemisphere which is more concerned than the other in the integration of sensations and the control of voluntary functions.

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cerebral hemisphere

n.

Either of the two symmetrical halves of the cerebrum, as divided by the longitudinal cerebral fissure.

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cerebral hemisphere

Etymology: L, cerebrum + Gk, hemi, half, sphaira, ball

one of the halves of the cerebrum. The two cerebral hemispheres are divided by a deep longitudinal fissure and are connected medially at the bottom of the fissure by the corpus callosum. Prominent grooves, subdividing each hemisphere into four major lobes, are the central sulcus, the lateral fissure, and the parietooccipital fissure. Each hemisphere also has a fifth major lobe deep in the brain. The hemispheres consist of an external gray layer and an internal white matter that surrounds islands of gray matter called nuclei (the basal ganglia).

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hemisphere [hem´ĭ-sfēr]

half of a spherical or roughly spherical structure or organ.

cerebral hemisphere one of the paired structures constituting the largest part of the brain, which together comprise the extensive cerebral cortex, centrum semiovale, basal ganglia, and rhinencephalon, and contain the lateral ventricle. See also brain.

cerebellar hemisphere either of the paired portions of the cerebellum lateral to the vermis.

dominant hemisphere the cerebral hemisphere that is more concerned than the other in the integration of sensations and the control of many functions. See also laterality.

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cerebral

pertaining to the cerebrum. See also brain.

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cerebral circulation

arterial blood supply reaches the anterior, middle and posterior cerebral arteries via the circle of Willis, in some species originating directly from the internal carotid and basilar arteries, in others via an interposed rete mirabile. See also blood-brain barrier, blood-CSF barrier, cerebrospinal fluid.

cerebral contusion

contusion of the brain following a head injury. See also cerebral contusion.

cerebral cortex

the convoluted layer of gray matter covering the cerebral hemispheres, which governs thought, memory, sensation and voluntary movement. See also brain, pyramidal tracts, extrapyramidal system.

cerebral cortical dysplasia

encompasses a range of disorders including neuronal heterotopia, microgyria, ulegyria, lissencephaly, pachygyria.

cerebral diencephalic syndrome

the clinical signs associated with lesions of the cerebral cortex and diencephalon. They include behavioral or mental change, abnormal movements such as circling and head pressing, deficits in contralateral postural responses and sometimes visual impairment.

cerebral dura mater

the membranous cover around the brain. Endosteal and meningeal layers are separated only by the cranial venous sinuses. Continuous with the spinal cord dura and the sheaths of the spinal nerves. Has three internal folds which separate sections of the brain. See falx cerebri, tentorium cerebelli, sella turcica.

cerebral edema, cytotoxic

caused by neurotoxins, this edema is intracellular.

cerebral edema, generalized

when all cerebral tissues are affected as in disturbances which create marked differences from normal of sodium and potassium ion concentration in tissues.

cerebral edema, interstitial

edema of the central white matter as in hydrocephalus affecting the brain and hydromyelia affecting the spinal cord.

cerebral edema, vasogenic

when the edema is intercellular and due usually to damage to the vascular endothelium.

cerebral flush

the congestion of the cerebral vessels causing a pink coloration; of infections by Babesia bovis and B. bigemina it is the former in which the cerebral flush occurs.

cerebral gyri

convolutions on the surface of the cerebrum.

cerebral hemisphere

symmetrical right and left halves of the cerebrum divided by the longitudinal fissure.

cerebral peduncle

see cerebral peduncle.

cerebral pia mater

thin connective tissue membrane that lies closely against the cerebral surface and carries blood vessels into the tissues of the brain.

cerebral piriform lobe

on the floor of the brain medial to the lateral olfactory tract.

cerebral pole

frontal (rostral) and occipital (caudal) poles of the cerebrum.

cerebral substantia nigra

occupies the interior of the cerebral peduncles.

cerebral syndrome

characterized by abnormal mental state, abnormal movements such as pacing or head pressing, visual impairment and seizures.

cerebral theileriosis

infection with Theileria parva or aberrant forms of T. taurotragi originating from the eland. Called also turning sickness.

cerebral vascular accident (CVA)

a disorder of the blood vessels serving the cerebrum, resulting from an impaired blood supply to parts of the brain. Called stroke in humans.

cerebral ventriculography

see ventriculography.

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hemisphere

half of a spherical or roughly spherical structure or organ.

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cerebral hemisphere

one of the paired structures constituting the largest part of the brain, which together comprise the extensive cerebral cortex, centrum semiovale, basal ganglia and rhinencephalon, and contain the lateral ventricle. See also brain.