  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. by this definition, the cerebral peduncles are also known as the basis pedunculi, while the large ventral bundle of efferent fibers is referred to as the crus cerebri or the pes pedunculi. there are numerous nerve tracts located within this section of the brainstem. 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. important fibers running through the cerebral peduncles include the corticospinal tract and the corticobulbar tract, among others. this area contains many nerve tracts conveying motor information to and from the brain to the rest of the body. ==additional images== file:gray677.png|scheme showing the connections of the several parts of the brain. file:gray682.png|superficial dissection of brain-stem. lateral view. file:gray683.png|dissection of brain-stem. lateral view. file:gray684.png|deep dissection of brain-stem. lateral view. file:gray705.png|dissection showing the projection fibers of the cerebellum. file:gray720.png|median sagittal section of brain. file:gray773.png|the left optic nerve and the optic tracts. file:gray792.png|upper part of medulla spinalis and hind- and mid-brains; posterior aspect, exposed in situ. file:human brainstem anterior view 2 description.jpg|human brainstem anterior view file:slide6dd.jpg|cerebral peduncle file:slide2cuc.jpg|cerebrum. deep dissection. inferior dissection. file:slide2hom.jpg|cerebral peduncle, optic chasm, cerebral aqueduct. inferior view. deep dissection. file:slide3hom.jpg|cerebral peduncle, optic chasm, cerebral aqueduct. inferior view. deep dissection. file:slide2mir.jpg|cerebrum.inferior view.deep dissection. file
Cerebrum