diencephalon

[di″en-sef´ah-lon]

1. the posterior part of the prosencephalon, consisting of the hypothalamus, thalamus, metathalamus, and epithalamus; the subthalamus is often considered to be a distinct division. See also brainstem.

2. the posterior of the two brain vesicles formed by specialization of the prosencephalon in the developing embryo. See illustration.

Diencephalon. Posterior (dorsal) A and anterior (inferior) B views of the base of the brain, showing the diencephalon in relation to the mesencephalon (midbrain) and rhombencephalon (hindbrain). From Dorland's, 2000.

di·en·ceph·a·lon

, pl.

di·en·ceph·a·la

(dī'en-sef'ă-lon, -sef'ă-lă), [TA]

The caudal part of the prosencephalon composed of the dorsal thalamus (or thalamus) epithalamus, subthalamus, and hypothalamus. the geniculate bodies, sometimes referred to as the metathalamus, are actualy part of the thalamus.

[G. dia, through, + enkephalos, brain]

Farlex Partner Medical Dictionary © Farlex 2012

diencephalon

(dī′ĕn-sĕf′ə-lŏn′, -lən)

The posterior part of the forebrain that connects the midbrain with the cerebral hemispheres, encloses the third ventricle, and contains the thalamus and hypothalamus. Also called betweenbrain, interbrain.

di·en·ce·phal′ic (-sə-făl′ĭk) adj.

di·en·ceph·a·lon

, pl. diencephala (dī'en-sef'ă-lon, -lă) [TA]

That part of the prosencephalon composed of the epithalamus, dorsal thalamus, subthalamus, and hypothalamus.

[G. dia, through, + enkephalos, brain]

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

diencephalon

The central, lower part of the brain that contains the BASAL GANGLIA, THE THALAMUS, the HYPOTHALAMUS, the PITUITARY gland.

Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

diencephalon

the part of the forebrain that contains the thalamus and hypothalamus and lies beneath the cerebral hemispheres.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Diencephalon

A part of the brain that binds the mesencephalon to the cerebral hemispheres. Considered by some as part of the brain stem.

Mentioned in: Korsakoff's Syndrome

Mentioned in

References in periodicals archive

The mesencephalon is tightly connected to the diencephalon, a little further back portion of the telencephalon (Fig.

Comparative Morphology and Histology of the Brain in Chinese Toad (Bufo gargarizans) and Chinese Fire-billed Newt (Cynops orientalis)/Morfologia e Histologia Comparada del Cerebro en el Sapo Chino (Bufo Gargarizans) y el Triton Vientre de Fuego Chino (Cynops orientalis)

Likewise, low expression of HTR1A can be observed in the parietal lobe, amygdala, basal ganglia, diencephalon, midbrain, brain stem and white matter.

Comparing the Expression of Genes Related to Serotonin (5-HT) in C57BL/6J Mice and Humans Based on Data Available at the Allen Mouse Brain Atlas and Allen Human Brain Atlas

It belongs to the part of the brain called the diencephalon, together with the thalamus and the melatonin-secreting pineal gland.

An anatomical and physiological evaluation of chronic stress including benefits various natural therapies can provide

Neuron loss in the cortex and widely distributed severe tau abnormalities were found throughout the cerebrum, diencephalon, basal ganglia, brainstem and spinal cord.

Ringing the bell for the last time: how the NFL's settlement agreement overwhelmingly disfavors NFL players living with chronic traumatic encephalopathy (CTE)

Anti-Ma2 encephalitis differs from typical paraneoplastic limbic encephalitis for most patients developed combination of the limbic system, diencephalon or brainstem encephalitis.

Anti-Ma2 Paraneoplastic Encephalitis Associated with Ileal Lymphoma

In most cadaveric dissection, Liliequist's membrane was composed of two distinct leaves: A diencephalic leaf directed toward the diencephalon (separated chiasmatic and interpeduncular cisterns) and a mesencephalic leaf directed toward the mesencephalon (separated interpeduncular and prepontine cisterns).

The distribution of subarachnoid and intraventricular hemorrhage on computed tomography suggests the location of an idiosyncratic vascular lesion

For example, shorter palpebral fissures predict volume reductions in the bilateral ventral diencephalon, a thinner anterior corpus callosum, and a thicker right inferior frontal cortex.

Advances in diagnosis and treatment of fetal alcohol spectrum disorders: from animal models to human studies

A statistically significant increase in nAChR density was observed in the group of ADNFLE patients in a region including the mesencephalon and an adjacent part of the diencephalon (superior area of the epithalamus) and in the cerebellum [46, 109].

Are absence epilepsy and nocturnal frontal lobe epilepsy system epilepsies of the sleep/wake system?

The rabbit diencephalon in stereotaxic coordinates.

Detection of acute cerebral hemorrhage in rabbits by magnetic induction

In all vertebrates studied, apart from mouse, the medial longitudinal fascicle (MLF) forms first, from a cluster of neurones in the basal diencephalon. In mouse, the descending tract of the mesencephalic nucleus of the trigeminal nerve (DTmesV) neurones appears first, closely followed by the appearance of MLF neurones [4, 6].

Development of the early axon scaffold in the rostral brain of the small spotted cat shark (Scyliorhinus canicula) embryo

They are normally positioned in the diencephalon, playing an important role in endocrine regulation.

Eyes as gateways for environmental light to the substantia nigra: relevance in Parkinson's disease