pallium


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pallium

 [pal´e-um]
2. the cerebral cortex during its development.

ce·re·bral cor·tex

[TA]
the gray cellular mantle (1-4 mm thick) covering the entire surface of the cerebral hemisphere of mammals; characterized by a laminar organization of cellular and fibrous components such that its nerve cells are stacked in defined layers varying in number from one, as in the archicortex of the hippocampus, to five or six in the larger neocortex; the outermost (molecular or plexiform) layer contains very few cell bodies and is composed largely of the distal ramifications of the long apical dendrites issued perpendicularly to the surface by pyramidal and fusiform cells in deeper layers. From the surface inward, the layers as classified in K. Brodmann's parcellation are: 1) molecular layer [TA]; 2) external granular layer [TA]; 3) external pyramidal layer [TA]; 4) internal granular layer [TA]; 5) internal pyramidal layer [TA]; and 6) multiform layer [TA], many of which are fusiform. This multilaminate organization is typical of the neocortex (homotypic cortex; isocortex [TA] in O. Vogt terminology), which in humans covers the largest part by far of the cerebral hemisphere. The more primordial heterotypic cortex or allocortex (Vogt) has fewer cell layers. A form of cortex intermediate between isocortex and allocortex, called juxtallocortex (Vogt), covers the ventral part of the cingulate gyrus and the entorhinal area of the parahippocampal gyrus.
On the basis of local differences in the arrangement of nerve cells (cytoarchitecture), Brodmann outlined 47 areas in the cerebral cortex that, in functional terms, can be classified into three categories: motor cortex (areas 4 and 6), characterized by a poorly developed internal granular layer (agranular cortex) and prominent pyramidal cell layers; sensory cortex, characterized by a prominent internal granular layer (granular cortex or koniocortex) and comprising the somatic sensory cortex (areas 1-3), the auditory cortex (areas 41 and 42), and the visual cortex (areas 17-19); and association cortex, the vast remaining expanses of the cerebral cortex.
Synonym(s): cortex cerebri [TA], pallium [TA], brain mantle, mantle (2)

pallium

/pal·li·um/ (pal´e-um) [L.]
2. the cerebral cortex during its period of development.pal´lial

pallium

(păl′ē-əm)
n. pl. pal·liums or pal·lia (-lē-ə)
The mantle of gray matter forming the cerebral cortex with the underlying white substance.

pallium

pal·li·um

(pal'ē-ŭm) [TA]
The cerebral cortex with the subjacent white substance.
Synonym(s): mantle (2) .
[L. cloak]

pallium

  1. the tissue next to the shell of molluscs.
  2. the roof of the vertebrate CEREBRUM.

pallium

the cerebral cortex viewed in its entirety, i.e. the mantle of gray matter covering both cerebral hemispheres. Also, the cerebral cortex during its development.
References in periodicals archive ?
Spatial learning induces increasing of argyrophilic nucleolar organizer region (AgNOR) of medial pallium neurons in toads (Rhinella arenarum).
1 Body surface of contracted animal subdivided into triangular areas by prominent, dominating grooves radiating from pallium.
27) El pallium (dim: palliolum) era el manto romano que fue llevado tanto por hombres como por mujeres (en este caso Palla).
The word "eadem" here refers to the previous topic in the letter, the confirmation of the pallium upon the bishop of Rouen (which, according to the division of the Frankish kingdom of 742, lay in Carloman's territory), and those of Rheims and Sens (Pippin's).
However, Pallium India does have a strong emphasis on integrating clinical practice with theory.
174) While the pallium had been given previously to
EMBL scientists have found brain structures related to the vertebrate pallium in a very distant cousin - the marine ragworm Platynereis dumerilii, a relative of the earthworm - which last shared an ancestor with us around 600 million years ago.
To address this issue, they examined the effect of selective ablation of the medial and lateral pallium (MP and LP respectively) on both the two-way avoidance and reversal spatial learning in goldfish.
Taking its clue from the word pallium, which is Latin for coat, it seems as if the plants provide an evergreen protective cover for the palliative ward (figures 2 and 3).
Su conclusion nos permitio, en junio de 1912, presentar en la "Revue Scientifique" un resumen titulado: "Essai d'un nouveau plan du cervau de l'Homme et des Singes, base sur l'evolution du Pallium dans la serie des Mamiferes".
For example, the narrator's description of one of the dealers in 15,4: "one of the dealers--a bald, warty-faced man, who was accustomed now and then even to act as a lawyer--went for the cloak and claimed that he would exhibit it tomorrow" (nescio quis ex cocionibus, calvus, tuberosissimae frontis, qui solebat aliquando etiam causas agere, invaserat pallium exhibiturumque crastino die affirmabat).