1. Neuron/Spinal Cord Histology Brain Anatomy Sheep Brain Dissection
Bio101
Laboratory 13
Neuron/Spinal Cord Histology Brain Anatomy
Sheep Brain Dissection
30 min, 13 slides

2. Brain, Cranial Nerves, and Spinal Cord
Objectives for today’s lab
Become familiar with the gross anatomy of the brain and spinal cord
Become familiar with the histology of nerve tissue and the spinal cord

3. Nervous Tissue Major characteristics Major Functions
Mononucleated (usually central)
Many cytoplasmic extensions
Usually surrounded by small, glial cells (supporting cells)
Major Functions
Transmission of nerve impulses
Sensory reception

4. Nervous Tissue

5. Overview of the Nervous System

6. Parts of the Brain * * * * * * * * * * GOOD DIAGRAM TO STUDY FOR EXAM
Average male brain ≈ 1,600g, average female brain ≈ 1,450g
Figure from: Saladin, Anatomy & Physiology, McGraw Hill, 2007

7. Relationship of the Brain and Skull

8. Brain – Superior View * * *

9. Brain – Anterior View * * * * * *

10. Brain – Posterior View * * * *
Transverse fissure *

11. Brain * * * * * * *

12. Ventricles of the Brain
Ventricles make and circulate cerebrospinal fluid, CSF

13. Brain

14. The Brain * * * * * * * * * * * Arbor vitae (Cerebral)
GOOD DIAGRAM TO STUDY FOR EXAM

15. Brain – Coronal Section
Figure from: Anatomy & Physiology Revealed, McGraw Hill, 2007
White matter
Cerebral cortex

16. Histology of Cerebral Cortex
Gray Matter (Cortex)
Gyrus
Sulcus
2 - 4 mm
White Matter

17. The Brain * * * * * * * *
Inferior View

18. Cranial Nerves (CN or N)* * * * * * *
GOOD DIAGRAM TO STUDY FOR EXAM

19. Cranial Nerves * * * * * * *

20. Spinal Cord

21. Spinal Cord Posterior * * * * * Anterior
(“funiculus” = column) * * * *
Anterior
GOOD DIAGRAM TO STUDY FOR EXAM

22. Spinal Cord * * * * * Gray matter Central canal
Posterior horn (axons of sensory neurons)
Lateral horn *
Anterior horn (cell bodies of motor neurons) *
White matter
Anterior median fissure
GOOD DIAGRAM TO STUDY FOR EXAM

23. Sheep Brain
???

24. Sheep Brain

25. Sheep Brain
Photo from: web.baypath.edu/.../sheep%20brain/brains-v.jpg
1. olfactory bulb 11. mammilary body 2. olfactory tract 13. trigeminal nerve 6. optic chiasma14. pons 7. optic nerve 15. trochlear nerve 8. optic tract1 6. abducens nerve 10. opening where the infundibulum attaches 18. spinal cord. 20. medulla oblongata 21
1. olfactory bulb 10. opening where the infundibulum attaches 2. olfactory tract 11. mammilary body 15. trochlear nerve medulla oblongata 6. optic chiasma 13. trigeminal nerve 16. abducens nerve oculomotor nerve 7. optic nerve 14. pons 18. spinal cord 8. optic tract

26. Sheep Brain
Photo from: 13 1 12 7 5 11 8 2 9 10 3 6 4
1. Corpus callosum 5. Pineal gland (body) Fourth ventricle Lateral ventricle 2. Thalamus 6. Mammillary Body Brain stem 3. Hypothalamus 7. Superior colliculus Arbor vitae (white matter) 4. Optic chiasm 8. Inferior colliculus Cerebellar gray matter

27. Sheep Brain – Sagittal Section
Photo from: web.baypath.edu/.../sheep%20brain/brains-v.jpg
1. lateral ventricle arbor vitae mammillary body 2. fornix cerebellar cortex (grey matter) hypothalamus 3. corpus callosum medulla oblongata thalamus pineal body fourth venticle optic chiasma 5. superior colliculus cerebral aqueduct olfactory bulb inferior colliculus pons 7. transverse fissure pituitary gland