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Anatomy & Physiology

Tegmental part at lower half of pons
Tegmental part at lower half of pons

Gray matter: Some cranial nerve nuclei and nuclei of pontine part reticular formation. l Abducent nerve nucleus: It is the nucleus of somatic efferent.

Medulla oblongata at the level of olive
Medulla oblongata at the level of olive

Structural characteristics Stretching of roof plate at this plane of medulla oblongata in embryonic life causes outward deviation (abduction) of alar.

Medulla oblongata at its middle
Medulla oblongata at its middle

Structural characteristics There is no more existance of gray matter area which is homologous to anterior horn. Gray matter of posterior horn presenting.

Medulla oblongata at its lower end (at the plane of motor decussation)
Medulla oblongata at its lower end (at the plane of motor decussation)

Structural characteristics At this level structure of medulla oblongata is almost similar to the structure of spinal cord, with centrally positioned gray.

Organization of Internal Structure at Different Level of Brainstem
Organization of Internal Structure at Different Level of Brainstem

Central cavity of brainstem show different characteristics and names at different level. At lower end of medulla it is a narrow canal continuous below.

Relations of Brainstem
Relations of Brainstem

Brainstem is the tubular stalk-like part of the brain made up of midbrain, pons and medulla oblongata from above downward. It is so called because it is.

Floor or Rhomboid Fossa
Floor or Rhomboid Fossa

Floor of fourth ventricle is formed by dorsal surfaces of pons and upper-half of medulla oblongata. It is called rhomboid fossa because it is rhomboid.

Myelin Sheath
Myelin Sheath

A nerve fiber, either in peripheral or in central nervous system carries nerve impulse towards destination. This impulse must reach the destination to.

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