Pons Cross Section Labeled

Identify and locate the cn s associated with the medulla pons and midbrain recognize the major internal and external landmarks on the dorsal and ventral surface of the brain stem so that you can determine if a gross or stained cross section is medulla pons or midbrain.

Pons cross section labeled. The pons varolii is the middle portion of the three parts of the brainstem sitting above the medulla and below the midbrain it acts as a relay between the cerebellum and cerebral hemispheres. The pons develops from the embryonic metencephalon part of the hindbrain developed from the rhombencephalon alongside the cerebellum. The pons is the largest part of the brainstem located above the medulla and below the midbrain it is a group of nerves that function as a connection between the cerebrum and cerebellum pons is latin for bridge.

It is made up of corticospinal and corticobulbar tracts traversing a craniocaudal pathway. The pons is also called the pons varolii bridge of varolius after the italian anatomist and surgeon costanzo varolio 1543 75. Brainstem brainstem cross sections caudal medulla caudal midbrain caudal pons mid pons midbrain rostral medulla rostral midbrain.

The playlist uses simplified sketches that are gradually drawn for th. The cross section of pons is similar to the midbrain as described earlier but few things must be kept in mind. 2012 06 08 brainstem sections handout category.

The pons has a bulbous shape and has two main components the basis pontis basal ventral part and the pontine tegmentum dorsal part. The dorsal region containing the cranial nerves and fourth ventricle is the tegmentum while the anterior part with the pontine nuclei and corticospinal and corticobulbar tracts is the base of the pons. A cross section of the lower part of the pons showing the pontine reticular formation labeled as 9 the human reticular formation is composed of almost 100 brain nuclei and contains many projections into the forebrain brainstem and cerebellum among other regions.

The pons can be subdivided into ventral basal and dorsal tegmental portions on the cross section for easier discussion. The basal pons or basis pontis is the larger of the two parts of the pons. The basis pontis consists of white matter.

Basic concepts surface features neuroscience pre clinical spinal cord tags. This region of the brainstem includes neural pathways and tracts that. This video is part of a playlist of videos on the internal structure of the brain stem.