Medulla oblongata Flashcards
Medulla oblongata is the _______ portion of the ______
Caudal
Brainstem
Which parts does the medulla oblongata connect?
Spinal cord and pons
What does medulla oblongata contain?
Many major sensory and motor tracts
Medulla oblongata is a location where…..`?
many tracts cross from right to left (decussation)
What kind of nuclei does medulla oblongata have and what do they regulate?
Gray matter nuclei
Regulate HR, vasomotor tone, RR, coordination of swallowing, vomiting, coughing, sneezing
How is the medulla oblongata shaped?
Cylinder shaped, caudally dorse-ventrally compressed
What divides the ventral side?
Fissura mediana
Sulcus lateralis ventralis
Is laterally located groove, exit for six (VI) and twelve (XII)
Sulcus lateralis dorsalis
Exit for nine (IX) and ten (X) cranial nerves
Pedunculi cerebellares caudales
Connect medulla oblongata to cerebellum
Pyramis
Pyramid longitudinal paired prominence on ventral surface. Contains largest descending white fiber nerve tracts (motor)
Corpus trapezoideum
Part of auditory pathway, exit for seven (VII) and eight (VIII) cranial nerves
Oliva
Pair of prominent oval structures lateral to pyramid and contain olivary nuclei (balance center)
NAME. Is laterally located groove, exit for six (VI) and twelve (XII)
Sulcus lateralis ventralis
NAME. Part of auditory pathway, exit for seven (VII) and eight (VIII) cranial nerves
Corpus trapezoideum
