internal structure of the brainstem Flashcards
differences between the sections through the midbrain
- upper midbrain: red nucleus and the oculomotor nerve are present
- lower midbrain: decussation of the superior cerebellar peduncles are present
red nucleus
oculomotor nerve
decussation of the superior cerebellar peduncles
where is the olive located
the upper part of the medulla
upper midbrain features
- superior colliculi
- red nucleus
- cerebral aqueduct
- periaqueductal grey matter
- medial lemniscus
- spinal lemniscus
- substantia nigra
- cerebral peduncles
upper midbrain - medial lemniscus pathway
upper midbrain - spinal lemniscus pathway
upper midbrain - superior colliculi
upper midbrain - red nucleus
upper midbrain - cerebral aqueduct
upper midbrain - periaqueductal grey matter
upper midbrain - substantial nigra
upper midbrain - cerebral peduncles
lower midbrain features
- inferior colliculi
- decussation of superior cerebellar peduncle
- cerebral aqueduct
- periaqueductal grey metter
- medial lemniscus
- spinal lemniscus
- cerebral peduncles
lower midbrain - inferior colliculi
lower midbrain - decussation of superior cerebellar peduncles
lower midbrain - cerebral aqueduct
lower midbrain - periaqueductal grey matter
lower midbrain - substantial nigra
cerebral peduncles
junction between midbrain and pons
- basilar pons (anteriorly)
- inferior colliculus (posteriorly)
junction - basilar pons
junction - inferior colliculus
upper pons features
- basilar pons
- corticospinal fibers
- superior cerebellar peduncles
- medial lemniscus
- lateral lemniscus
upper pons - corticospinal fibers pathway
aka pyramidal tract
upper pons - superior cerebellar peduncles
upper pons - medial lemniscus
upper pons - lateral lemniscus
middle pons features
- basilar pons
- corticospinal fibers
- pontocerebellar fibers
- middle cerebellar peduncles
- medial lemniscus
- 4th ventricle
middle pons - pontocerebellar fibers
middle pons - middle cerebellar peduncles
middle pons - medial lemniscus
middle pons - 4th ventricle
upper medulla features
- inferior olivary nucleus
- medial lemniscus
- pyramids
- 4th ventricle
- inferior cerebellar peduncles
upper medulla - inferior olivary nucleus
upper medulla - medial lemniscus
upper medulla - pyramids
upper medulla - 4th ventricle
upper medulla - inferior cerebellar peduncles
lower medulla features
- gracile fasciculus and nucleus
- cuneate fasciculus and nucleus
- internal arcuate fibers
- medial lemniscus
- pyramids
lower medulla - gracile fasciculus and nucleus
lower medulla - cuneate fasciculus and nucleus
lower medulla - internal arcuate fibers
lower medulla - medial lemniscus
lower medulla - pyramids