Sectional Anatomy of the Brain Stem

Dr. Rayhan ShahrearDept. of Anatomy, BSMMU.

2

Objectives

• Describe the relation of the structures in the sections at each level of the brain stem.• Discuss some neuro-anatomical terminologies relevant to brain

stem.• Explain the fuctional components of cranial nerves.

3

Alar

Basal

4

5

6

7

8

GVA

SVA

GSA

SSA

GSE

SVE

GVE

9

FG

FC

ST

SC

VSC

DSC

10

NGFG

NCFC

MAON

SG VST V

LST

PSCASC

Medulla at Pyramidal Decussation

11

ML

IAF

Medulla at Medial Lemniscus Decussation

12

ICP

Medulla at Mid Olive

13

Medulla above the Olive

14

MCP

Pons at Facial Colliculus

SCP

15

Pons at Trigeminal Nuclei

SL

16

DSCP

TL

ML

Mid Brain at Inf. Colliculus

SL

17

Mid Brain at Sup. Colliculus

18

SC

ONN

RN

MNT

SN

TPF

CF

FP

RF

III

Mid Brain at Sup. Colliculus

19

Mid Brain at Inf. Colliculus

IC

TNN

IV

20

21

Pons at Trigeminal Nuclei

PN

CS

MN VSN V

V

22

Pons at Facial Colliculus

VII

VI

MN VII

N VI

23

24

25

Medulla above the Olive

P

AN

PCNACNLVN

MVN

NAN XIIDN X

MLFTST

26

Pons at Facial Colliculus

TB

27

Pons at Trigeminal Nuclei

28

Mid Brain at Inf. Colliculus

LL

29

Mid Brain at Sup. Colliculus

30

Mid Brain at Inf. Colliculus

31

Pons at Trigeminal Nuclei

32

Pons at Facial Colliculus

33

Medulla above the Olive

34

NTS

X

XII

Medulla at Mid Olive

35

36

N XII

XII

N XI

XI

Medulla at ML Decussation

37

XI

N XI

PD

Medulla at Pyramidal Decussation

38

PDMLF

39

40

Thank You