Lower Pons Cross Section
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Lower pons cross section. Division of the pons into two parts facilitates understanding its internal arrangement. Level near the junction with the pons level of the olive. Anterior is down posterior is up.
The brainstem is the most inferior and primitive part of the brain continuous caudally with the spinal cord and rostrally with the diencephalon thalamus hypothalamus epithalamus and subthalamus the named parts from cranial to caudal comprise the midbrain mesencephalon pons metencephalon and medulla oblongata myelencephalon. Brainstem brainstem cross sections caudal medulla caudal midbrain caudal pons mid pons midbrain rostral medulla rostral midbrain. The diagram is drawn as if the whole course of this nerve is present in a single section but only part of this nerve is found on an actual section through this level of the pons.
Upside down mickey mouse. Cn viii cochlear division. Basic concepts surface features neuroscience pre clinical spinal cord tags.
A cross section of the lower part of the pons showing the pontine reticular formation labeled as 9. It is made up of corticospinal and corticobulbar tracts traversing a craniocaudal pathway. Cross section of lower pons axons shown in blue grey matter in light grey.
Cn viii enters the brainstem slightly lower at the ponto cerebellar angle see figure 6 and figure 7. Diagram of a cross section taken horizontally through the lower part of the pons of a human brainstem and stained with the kluver barrera method. Pons cross section through the facial colliculus.
The reticular formation consists of more than 100 small neural networks with varied functions including. 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 number of cranial nerve nuclei are present in the pons.