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Comparing the Sheep Brain to the Human Brain – A Visual Guide to Use During Sheep Brain Dissection Laboratories Margarita Bracamonte, Ph.D. Northland Community & Technical College, East Grand Forks, MN Several Community and Technical Colleges currently do not have a human cadaver laboratory to teach human anatomy and physiology labs. To learn about the human brain anatomy, sheep brains are usually dissected in anatomy and physiology laboratories at Community and Technical Colleges. Therefore, the next slides can be used during the sheep brain dissection laboratory to visually compare the sheep brain to human brain structures with the goal to learn the anatomy of the human brain. How much does the sheep brain weight compared to the human brain? Sheep Brain? 140 grams* *1 pound = 453.6 grams Human Brain? 3 - 4 pounds Human Brain Sheep Brain Cerebellum Spinal Cord The human brain (and sheep brain) is made up of four parts: 1. Cerebrum Human Brain 2. Cerebellum Sheep Brain Continues… Midsagittal Section 3. Diencephalon 4. Brainstem Human Brain Sheep Brain 4. Brainstem Ventral View Human Brain Sheep Brain Spinal Cord Spinal Cord Brainstem Structures found in the Cerebrum Sheep Brain Cerebrum Superior View Human Brain Cerebrum – Superior View Longitudinal Fissure Sheep Brain Human Brain Cerebrum Human Brain – Right Lateral View Transverse Fissure Sheep Brain – Superior View Cerebrum Gyri (Gyrus – Singular) Sheep Brain – Superior View Human Brain – Lateral View Cerebrum Sulci (Sulcus – Singular) Sheep Brain - Superior Human Brain – Left Lateral View Cerebrum – Midsagittal View Sulci - shallow groves between gyri Human Brain Sheep Brain (Right Lateral View): Cerebral Lobes Parietal Lobe Frontal Lobe Temporal Lobe Occipital Lobe Human Brain (Right Lateral View)-Cerebral Lobes Frontal Lobe Parietal Lobe Temporal Lobe Occipital Lobe Gray & White Matter of the Cerebrum Sheep Brain (Anterior) Human Brain Gray Matter White Matter (Posterior) Gray Matter = Cerebral Cortex Human Brain Cerebral Cortex What parts of a neuron are found at the cerebral cortex? White Matter = Cerebral Medulla Human Brain Cerebral Medulla What parts of a neuron are found at the cerebral medulla? Structures found at the Cerebrum Corpus Callosum Human Brain Sheep Brain Midsagittal Section Structures found at the Cerebrum Fornix Human Brain Sheep Brain Midsagittal Section Structures found at the Cerebrum Lateral Ventricles Human Brain Sheep Brain Midsagittal Section Structures found at the Cerebrum Third Ventricle Human Brain Sheep Brain Midsagittal Section Structures found at the Cerebrum Fourth Ventricle Human Brain Sheep Brain Midsagittal Section Structures found at the Cerebellum Human Brain Cerebellum Sheep Brain Midsagittal Section Human Brain Human Brain Cerebellar Cortex (Gray matter) Sheep Brain What parts of a neuron are found at the cerebellar cortex? Midsagittal Section Human Brain Human Brain Cerebellar Medulla (White matter) Sheep Brain What parts of a neuron are found at the cerebellar medulla? Structures found at the Brainstem Sheep Brain Human Brain Spinal Cord Spinal Cord Brainstem Ventral View Structures found at the Brainstem Pons Spinal Cord Spinal Cord Sheep Brain Human Brain Structures found at the Brainstem Medulla Oblongata Spinal Cord Spinal Cord Sheep Brain Human Brain Structures found at the Brainstem Midsagittal Section Human Brain Midbrain Sheep Brain Structures found at the Diencephalon Diencephalon Human Brain Sheep Brain Midsagittal Section Structures found at the Diencephalon Thalamus Human Brain Sheep Brain Midsagittal Section Structures found at the Diencephalon Hypothalamus Human Brain Sheep Brain Midsagittal Section Cranial Nerves – Olfactory Nerves Spinal Cord Spinal Cord Sheep Brain – Ventral View Human Brain – Ventral View Cranial Nerves – Olfactory Nerves Olfactory Bulbs Spinal Cord Spinal Cord Sheep Brain – Ventral View Human Brain – Ventral View Cranial Nerves – Olfactory Nerves Olfactory Tracts Spinal Cord Spinal Cord Sheep Brain – Ventral View Human Brain – Ventral View Cranial Nerves – Optic Nerves Spinal Cord Spinal Cord Sheep Brain Human Brain Optic Nerves Cross at Optic Chiasm Optic Chiasm Optic Chiasm Spinal Cord Spinal Cord Sheep Brain Human Brain Cranial Nerves – Optic Nerves Optic Tracts Optic Tracts Spinal Cord Spinal Cord Sheep Brain Human Brain Practice your Knowledge About the Human Brain Anatomy…. Name the cerebral lobe Anterior Posterior Describe the function of this cerebral lobe Practice your Knowledge About the Human Brain Anatomy…. Name this part of the human brain. Anterior Anterior Describe its function… Posterior Posterior Practice your Knowledge About the Human Brain Anatomy…. Anterior Name this part of the human cerebrum Describe its function… Posterior Practice your Knowledge About the Human Brain Anatomy…. Inferior view of the human brain. Name this part of the brainstem Describe its function… Practice your Knowledge About the Human Brain Anatomy…. Inferior view of the human brain. Describe the function of these nerves… Name these nerves Practice your Knowledge About the Human Brain Anatomy…. Name this fissure Anterior Anterior Describe its function… Posterior Posterior
