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12d classification of thalamic nuclei - Coggle Diagram
12d
classification of thalamic nuclei
Anatomical classification
Anterior group of nuclei.
The mass of grey matter enclosed within the bifurcation of the internal medullary lamina
Lateral group of nuclei
The mass of grey matter present in the lateral part of thalamus is subdivided into
-ventral and
-dorsal group of nuclei,
each containing 3
nuclei:
Ventral group of nuclei
Ventral anterior nucleus,
Ventral lateral (lateroventral) nucleus and
Ventral posterior (posteroventral) nucleus
Ventral posterolateral nucleus
Ventral posteromedial nucleus
Medial and lateral geniculate bodies are present in the posterior zone of ventral groups of nuclei.
Dorsal group of nuclei
Lateral dorsal nucleus,
Lateral posterior nucleus and
Pulvinar.
Medial group of nuclei
Dorsomedial nuclei
present in the medial part of thalamus,
Centromedian nucleus
and other interlaminar nuclei present within the
internal medullary lamina and
Midline nuclei
that lie between the medial part of thalamus and the ependyma of the third ventricle.
Functional classification
Nonspecific projection nuclei
are those which receive impulses for diffuse secondary responses
from the reticular-activating system (RAS) and project diffusely to the
whole of neocortex.
Midline nuclei and
Centromedian nucleus.
Specific projection nuclei.
They receive specific sensations and project to specific portions of neocortex and limbic system. Depending upon the type of sensation, the
specific projection nuclei can be divided into 4 groups:
Specific sensory relay nuclei.
a) Medial geniculate bodies,
b) Lateral geniculate bodies and
c) Posteroventral group of nuclei.
Motor control nuclei.
a) Ventrolateral group of nuclei
b) Ventral anterior nucleus.
Visceral efferent control nuclei.
a) Anterior group of nuclei
b) Dorsomedial nucleus.
Integrative and perceptual function control nuclei.
a) Pulvinar nucleus,
b) Lateral posterior nucleus
c) Dorsal lateral nucleus.