Mention the gross components related to somatic motor function. Explain the mechanism of planning to execution of somatic motor function. Correlate the basic pathology of motor movement with the normal one. Presented by Dr. Zobayer Mahmud Khan Resident, MS (Anatomy), Block-4 Guided by Dr Nahid Farhana Amin Associate Professor Dept of Anatomy, BSMMU

3. What do we usually do
in the seminar room?

4. Functional Neuroanatomy of
the Motor System from
Planning to Execution
Dr. Zobayer Mahmud Khan
Resident, MS (Anatomy), Block-4
Guided by
Dr Nahid Farhana Amin
Associate Professor
Dept of Anatomy, BSMMU

5. Objectives
• Mention the gross components related to
somatic motor function
• Explain the mechanism of planning to
execution of somatic motor function
• Correlate the basic pathology of motor
movement with the normal one

7. Areas of the brain
46
8
9
10
11
12
44
45
22
39
40
3 1 2 5 7
6

8. Areas
43 1 2
7 5
9
10
11
12

9. Motor homunculus

10. Our concept of motor function

11. video (penalty)

12. Basic concept of motor activity

13. Basal nuclei

14. Cerebellum

15. Thalamus

16. Structure of Basal nuclei

17. Structure of Basal nuclei

18. • Video (Basal nuclei)

19. Planning

20. Basic dysfunction of
striatal region of the circuitry
• Hypokinesia & hypertonia
• Hyperkinesia & hypotonia

21. • Video (magic)

22. Structure of the cerebellum

23. Structure

24. Cerebellar homunculus

25. Planning

26. Planning

27. Execution

28. Basic dysfunctions
• Timing- Irregular contraction
• Strength- Weak movement
• Direction- Abnormal gait
• Duration- Movement for prolonged period
• Smoothness- Decomposition of the movement
• Coordination- Inability to do alternative
movements

29. Thalamus

30. Execution

31. Execution

32. Execution

33. Execution

34. UMN and LMN lesion
Flaccidity
and
spasticity

35. • Movie song video

36. Speech production circuitry

37. Lesions related to the disorders of
motor speech area
• Motor aphasia
• Conduction aphasia

38. Conjoint (saccadic) movement
of the eye

39. Saccadic disorders
• Abnormal speed of eye movements
(generally slow)

40. Summery

41. Thank You

44. Lesions related to the disorders of
motor speech area
• Motor aphasia ( the patient can not speak
properly although he knows what he
intends to communicate
• Conduction aphasia association fibers
connecting the broca’s and wernick’s area
are destroyed. Speech is fluent,
comprehension is intact but the repetition
of spoken language is extremely difficult