Interpeduncular nucleus
Encyclopedia
The Interpeduncular nucleus is a unpaired, ovoid cell group at the base of the midbrain tegmentum
. It is located in the mesencephalon
below the interpeduncular fossa
. As the name suggests, the interpeduncular nucleus lies in between the cerebral peduncles
.
It receives the retroflex fasciculus from the habenula
, and projects to the raphe nuclei
and periaqueductal gray substance of the midbrain.
The Interpeduncular nucleus contains two neuron clusters of different morphologies.
It has lately been claimed that the Interpeduncular nucleus has a role in the regulation of Rapid eye movement sleep
Midbrain tegmentum
The midbrain tegmentum is the part of the midbrain extending from the substantia nigra to the cerebral aqueduct in a horizontal section of the midbrain. It forms the floor of the midbrain which surrounds the cerebral aqueduct.-External links:*...
. It is located in the mesencephalon
Mesencephalon
The midbrain or mesencephalon is a portion of the central nervous system associated with vision, hearing, motor control, sleep/wake, arousal , and temperature regulation....
below the interpeduncular fossa
Interpeduncular fossa
The Interpeduncular fossa is a somewhat lozenge-shaped area of the base of the brain, limited in front by the optic chiasma, behind by the antero-superior surface of the pons, antero-laterally by the converging optic tracts, and postero-laterally by the diverging cerebral peduncles.The structures...
. As the name suggests, the interpeduncular nucleus lies in between the cerebral peduncles
Cerebral peduncle
Mainly, the three common areas that give rise to the cerebral peduncles are the cortex, the spinal cord and the cerebellum. The cerebral peduncle, by most classifications, is everything in the mesencephalon except the tectum. The region includes the midbrain tegmentum, crus cerebri and pretectum...
.
It receives the retroflex fasciculus from the habenula
Habenula
In neuroanatomy, habenula originally denoted the stalk of the pineal gland , but gradually came to refer to a neighboring group of nerve cells with which the pineal gland was believed to be associated, the habenular nucleus...
, and projects to the raphe nuclei
Raphe nuclei
The raphe nuclei are a moderate-size cluster of nuclei found in the brain stem. Their main function is to release serotonin to the rest of the brain...
and periaqueductal gray substance of the midbrain.
The Interpeduncular nucleus contains two neuron clusters of different morphologies.
It has lately been claimed that the Interpeduncular nucleus has a role in the regulation of Rapid eye movement sleep