Brain stem 1- Medulla oblongata 2- Pons 3- Mid brain.

Brain stem

1- Medulla oblongata

2- Pons

3- Mid brain

Bulb of the brain

borders

Medullopontine sulcus

c1

Height and wide

3 cm

2 cm

Medulla division

`

Lower closed part

upper open part

External surfaceFissure, sulcus ,tubercle

Fissure, sulcus ,

Ant. RegionLat. RegionPost. Region

Causes of tuberclesCauses of tubercles

1- pyramid1- pyramid 2- olive2- olive 3- gracilis3- gracilis 4- cuneatus4- cuneatus 5- terigeminal5- terigeminal

Spinomedullary junction

1- Separation of ant horn 2- Diverge of posterior horn, and appearance

of three nuclei 3- Appearance of Forth ventricle

Nuclei of spinomedullary junction

1- spinal nucleus of accessory nerve 2- supraspinal nucleus 3- gracilis nucleus 4- cuneatus nucleus 5- spinal nucleus of trigeminal nerve

Nuclei in the closed and open parts Nuclei in the closed and open parts of medulla oblongataof medulla oblongata

1- somatosensory nuclei1- somatosensory nuclei

2- rely nuclei to the cerebellum2- rely nuclei to the cerebellum

3- nuclei of cranial nerves3- nuclei of cranial nerves

1- somatosensory nuclei

1- Gracilis nucleus 2- Cuneatus nucleus 3- Spinal nucleus of trigeminal

nerve 4- Nucleus z

2- rely nuclei to the cerebellum

1- inferior oilvary complex nuclei 2- accessory cuneatus (lat/ext

cuneatus)or Monakow 3-arcuate nucleus

1- inferior oilvary complex nuclei

3-arcuate nucleus

3- nuclei of cranial nerves

1-Hypoglossal nucleus 2-Dorsal nucleus of vagus 3-Ambigus nucleus 4-Vestibular nuclei 5-Coclear nuclei (dorsal and ventral) 6-Solitary nucleus

1-Hypoglossal nucleus

2-Dorsal nucleus of vagus

3-Ambigus nucleus

Ambigus nucleus

Ambigus nucleus

4-Vestibular nuclei

5-Coclear nuclei (dorsal and ventral)

Solitary nucleus

Solitary nucleus

Non- Gustatory 9 - 10

Inferior salivatory nucleus

Inferior salivatory nucleus

Glossopharyngeal nerve