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Lab Practical 3: Nervous System You are responsible for learning all of the following nervous system structures 1 2 4 3 9 6 5 8 7 Structures of the Multipolar Neuron 1. Dendrites 2. Nucleus 3. Axon hillock 4. Schwann Cell 5. Axon 6. Myelin 7. Terminal 8. Neurilemma 9. Node of Ranvier See next slide for what the numbered structures are. Structures on Cross-section of Spinal Cord 1. Dorsal column 2. Lateral column 3. Ventral column 4. Anterior white commissure 5. Dorsal horn 6. Lateral horn 7. Ventral horn 8. Gray commissure 9. Central canal 10. Posterior median sulcus 14. Anterior median fissure See next slide for what the numbered structures are. 27 29 30 Structures on Cross-section of Spinal Cord 12. Dorsal rootlets 13. Ventral rootlets 23. Dorsal root 24. Dorsal root ganglion 25. Ventral root 26. Spinal nerve 27. Dorsal ramus 28. Ventral ramus 29. White ramus 30. Gray ramus 1 2 Spinal Cord and Plexuses 1. Cervical plexus (C1-C5) 2. Brachial plexus (C5-T1) 3. Spinal cord 4. Lumbar plexus (L1-L4) 5. Cauda equina 6. Sacral plexus (L4-S4) 3 4 5 6 1 3 Spinal Cord and Plexuses 2 1. Spinal cord 2. Cauda equina 3. Lumbar plexus (L1-L4) 4. Sacral plexus (L4-S4) 5. Sciatic nerve 4 5 1 2 4 5 3 Brain, Spinal Cord and Plexuses 1. Cerebrum 2. Cerebellum 3. Spinal cord 4. Cervical plexus (C1-C5) 4. Brachial plexus (C5-T1) 8 cervical nerves 31 Pairs of Spinal Nerves 12 thoracic nerves 5 lumbar nerves 5 sacral nerves 1 coccygeal nerves Note the spinal scoliosis Spinal nerves 8 Cervical 12 Thoracic 5 Lumbar Lobes of Cerebrum 1. Frontal lobe 2. Parietal lobe 3. Occipital lobe 4. Temporal lobe 5. Lateral fissure 6. Transverse fissure 2 5 4 3 6 1 5 6 7 1 1 1 1 2 4 Brain Structures 1. Gyri (ridges) 2. Sulci (creases) 3. Occipital lobe 4. Temporal lobe 5. Postcentral gyrus 6. Central sulcus 7. Precentral gyrus Gyri, Sulci, Fissures and Lobes 1. Postcentral gyrus 2. Central sulcus 3. Precentral gyrus 4. Longitudinal fissure 5. Frontal lobe 6. Parietal lobe 7. Occipital lobe 7 4 6 4 1 1 2 2 3 3 4 5 Brain Structures 10. Corpus callosum 21. Hypothalamus 22. Intermediate mass of thalamus 23. Pineal gland 25. Pituitary gland 31. Corpora quadrigemina of midbrain 32. Midbrain Brain Structures 1. Midbrain 2. Pons 3. Medulla oblongata 4. Spinal cord 5. Cerebellum 6. Arbor vitae of cerebellum 1 5 2 6 3 4 Brain Structures Associated with Ventricles 11. Septum pellucidum (wall between lateral ventricles) 20. Third ventricle 40. Cerebral aqueduct 41. Fourth ventricle 40 41 Brain Structures 36. Septum pellucidum 43. Third ventricle 50. Arbor vitae of cerebellum 54. Midbrain 60. Fourth ventricle 61. Medulla oblongata 64. Spinal cord 65. Central canal 70 71 70. Pons 71. Cerbral aqueduct 1 2 3 4 6 5 7 8 9 Brain Structures 1. Frontal lobe 2. Olfactory bulb 3. Olfactory tract 4. Optic nerve 5. Pituitary gland 6. Temporal lobe 7. Pons 8. Medulla oblongata 7 Cranial Nerves 1. Optic nerve 2. Optic chiasma 3. Optic tract 5. Trigeminal nerve 7. Olfactory bulb 8. Olfactory tract 1 2 3 5 Other Brain structures 25. Pituitary gland 36. Pons 39. Medulla oblongata 2 1 3 5 4 Ventricles 1. Lateral ventricle 2. Lateral ventricle 3. Third ventricle 4. Fourth ventricle 5. Cerebral aqueduct Ventricles 1. Lateral ventricle 2. Lateral ventricle 3. Third ventricle 4. Fourth ventricle 5. Cerebral aqueduct 1 3 2 5 4 Cranial Nerves 1. Superior sagittal sinus 2. Arachnoid granulation 1 2 Brainstem and Diencephalon 2. Thalamus 16. Pons 19. Medulla oblongata o Brainstem and Diencephalon a. pons b. medulla oblongata c. midbrain i. corpora quadrigemina n. 3rd ventricle o. thalamus