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Bio101 Laboratory 13 Neuron/Spinal Cord Histology Brain Anatomy Sheep Brain Dissection

Bio101 Laboratory 13 Neuron/Spinal Cord Histology Brain Anatomy Sheep Brain Dissection. Brain, Cranial Nerves, and Spinal Cord. Objectives for today’s lab Become familiar with the gross anatomy of the brain and spinal cord

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Bio101 Laboratory 13 Neuron/Spinal Cord Histology Brain Anatomy Sheep Brain Dissection

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  1. Bio101 Laboratory 13 Neuron/Spinal Cord HistologyBrain Anatomy Sheep Brain Dissection

  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 • 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 * * * * * * (Cerebral) * * * * Arbor vitae * 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 * (“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 21 1. olfactory bulb 10. opening where the infundibulum attaches2. olfactory tract 11. mammilary body 15. trochlear nerve 20. medulla oblongata 6. optic chiasma 13. trigeminal nerve 16. abducens nerve 21. oculomotor nerve 7. optic nerve 14. pons 18. spinal cord 8. optic tract

  26. Sheep Brain Photo from: www.cals.ncsu.edu/course/zo250/Lab9b.gif 13 1 12 7 5 11 8 2 9 10 3 6 4 1. Corpus callosum 5. Pineal gland (body) 9. Fourth ventricle 13. Lateral ventricle 2. Thalamus 6. Mammillary Body 10. Brain stem 3. Hypothalamus 7. Superior colliculus 11. Arbor vitae (white matter) 4. Optic chiasm 8. Inferior colliculus 12. Cerebellar gray matter

  27. Sheep Brain – Sagittal Section Photo from: web.baypath.edu/.../sheep%20brain/brains-v.jpg 1. lateral ventricle 8. arbor vitae 15. mammillary body 2. fornix 9. cerebellar cortex (grey matter) 16. hypothalamus 3. corpus callosum 10. medulla oblongata 17. thalamus 4. pineal body 11. fourth venticle 18. optic chiasma 5. superior colliculus 12. cerebral aqueduct 19. olfactory bulb 6. inferior colliculus 13. pons 7. transverse fissure 14. pituitary gland

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