cerebral peduncle

The left cerebral peduncle contains motor fibers that cross over to the right side of the body.

This produces a visible "notch" in the cerebral peduncle.

This is due to destruction or pressure applied to the motor fibers located in the cerebral peduncle.

The cerebral peduncle, by most classifications, is everything in the mesencephalon except the tectum.

In some older texts this is called the cerebral peduncle but presently it is usually limited to just the anterior white matter portion of it.

Contralateral hemiplegia: Cerebral peduncle.

This lesion is usually a unilateral infarction of the red nucleus and cerebral peduncle, affecting several structures in the midbrain including:

Weber's syndrome: third nerve palsy and contralateral hemiplegia: Third nerve and cerebral peduncle.

As indicated by its name, it is located at the junction between the pons and the cerebral peduncle, lateral to the decussation of the brachium conjunctivum.

Kernohan's notch is a cerebral peduncle indentation associated with some forms of transtentorial herniation (uncal herniation).

(4) fibers passing from the frontal lobe through the medial fifth of the base of the cerebral peduncle to the nuclei pontis.

Lateral posterior choroidal branches: small branches to the cerebral peduncle, fornix, thalamus, and the caudate nucleus.

Thus, if you have a right hemisphere trans-tentorial herniation, it causes a Kernohan's notch in the left cerebral peduncle which results in right-sided motor impairment.

Kernohan's notch is a groove in the cerebral peduncle that may be caused by this displacement of the brainstem against the incisura of the tentorium.

The tectum, pretectum, cerebral peduncle and other structures develop out of the mesencephalon, and its cavity grows into the mesencephalic duct (cerebral aqueduct).

Of note, in the cerebral peduncular loop fibers from motor areas of the brain project to the cerebral peduncle and then project to various thalamic nuclei.

On either side of this band the trochlear nerve emerges, and passes forward on the lateral aspect of the cerebral peduncle to reach the base of the brain.

These UBOs are typically found in the Cerebral peduncle, pons, midbrain, globus pallidus, thalamus, and optic radiations.

The cerebral crus is the anterior portion of the cerebral peduncle which contains the motor tracts, the plural of which is cerebral crura.

Pressure relief to "un-notch" the cerebral peduncle may include the removal of brain tumors and blood clots or the suction of blood from a drilled hole in the skull.

The signal starts with the upper motor neurons carrying the signal from the precentral gyrus down through the internal capsule, through the cerebral peduncle, and into the medulla.

Kernohan's notch phenomenon is a result of the compression of the cerebral peduncle, which is part of the mesencephalon, against the tentorium cerebelli due to transtentorial herniation.

Peduncular perforating or postero-lateral ganglionic branches: small arteries which arise from the posterior cerebral artery after it has turned around the cerebral peduncle; they supply a considerable portion of the thalamus.

The pathway starts in the layer V neurons of the cerebral cortex that project via the cerebral peduncle to the neurons of the anterior portion of the pons (the basis pontis).

An exception to the mildness of clinical symptoms associated with VRS dilation is when there is extreme dilation in the lower mesencephalon at the junction between the substantia nigra and cerebral peduncle.