Medulla Ablongata Flashcards
Length
3 cm long
Extension
Above : lower border of pons
Below :continues with the spinal cord
Extension
Above : lower border of pons
Below :continues with the spinal cord
Parts
Open medulla
Closed medulla
Open medulla
Forms a part of the floor of the fourth ventricle
Closed medulla
Traversed by central canal
External features of ventrolateral surface
1) anterior median fissure
2) pyramid
3) olive
4) inferior cerebellar peduncles
Anterior median fissure
Continues with that of the spinal cord
Pyramid
Is an elongated elevation produced by corticospinal tract
Olive
Oval elevation overlying the inferior oliver nucleus
Hypoglossal nerve
From anterolateral sulcus
Inferior crebellar peduncle
Bundle of nerve fibers connects the medulla and cerebellum
Posterolateral suçu
Exit of glossopharyngeal, vagus , cranial root of accessory nerve
Dorsal surface of open medulla
Forms a part of the 4th ventricle floor
Medullary stria
seperates between the dorsal surface of open medulla and pons
what is the lateral boundary of the open medulla
inferior cerebellar peduncle
what and where is the inferior fovea
lateral to the median sulcus
it is an inverted v shaped depression
what are the 3 triangular areas formed by the inferioi fovea
hypoglossal trigone
vagal trigone
vestibular area
hypoglossal trigone
overlies the nucleus of hypoglossal nerve
vagal trigone
dorsal nucleeus of vagus
vestibular area
inferior and medial vestibular nuclei
what is area prostrema
the vomiting center
where is area prostrema
a protuberance on the inferoposterioi limit of left ventricle
what are the features found on the dorsal surface of closed medulla
posterior median sulcus cracile tract and tubercle cunaete tract and tubercle tuberculum cinereum inferior cerebellar peduncle
gracile tubercle
gracile nucleus
cuneate tubercle
cuneate nucleus
trabeculum cinerum
spinal nucleus of trigeminal
blood supply of medulla
ant spinal artery
4th part of vertebral artery
post inf cerebellar
post spinal artery
bs of ventrolateral surface
ant spinal and 4th part of vertebral
bs of posterolateral surface
post inf cerebellar
bs of cunaete and gracile tracts and tubercles
post spinal artery
