Neuroanatomy

Neuroanatomy - Lateral View of the Sheep Brain Dorsal...

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Dorsal Ventral Horizontal Section Medulla Olfactory bulbs Optic nerves and chiasm Look for pituitary here Posterior Anterior Lateral View of the Sheep Brain
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Primary Motor Cortex Central Sulcus Primary Sensory Cortex Frontal Lobe Optic Nerve Parietal Lobe Occipital Lobe Cerebellum Temporal Rhinal Pyriform Lobe Fissure Cortex Pons Medulla Spinal Cord Lateral View of the Sheep Brain Occipital Cortex Temporal Cortex Primary Motor Cortex Central Sulcus Primary y Cortex Sensor Longitudina ( Frontal Cortex l Fissure Midline) Parietal Cortex Cerebellum Spinal Cord Sulcus Gyrus Dorsal View of the Sheep Brain
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Cerebellar Dissection Use the knife to cut the cerebellum off of the medulla. From the posterior end, gently lift the cerebellum and make a horizontal cut through the cerebellar peduncles , large fiber tracts from the spinal cord to the cerebellum. Do not cut through the medulla. Cut the cerebellum from the brain stem according to the orientation indicated by the gray line The dorsal surface of the medulla forms the floor of the fourth ventricle . The cerebellum, with the attached anterior and posterior membranes forms the roof of the fourth ventricle. The fourth ventricle is continuous posterior with the spinal canal , and anterior with the third ventricle via the cerebral aqueduct . The third ventricle and the cerebral aqueduct will be more easily visualized from the midline perspective. The ventricular system in the brain is an important means of rapid communication. It is continuous within the central nervous system (CNS). Bisect the cerebellum from anterior to posterior (cut it in half). Notice the white “lines” running through. The fiber tracts sending information from one area to another appear white due to the presence of myelin. Myelin surrounds the axon and speeds the electrical signal passing down the axon. The darker gray matter is the cerebellar cortex, and is made up of cell bodies, unmyelinated projections, and glia. Superior Colliculus Inferior Colliculus Cerebellar Peduncles Fourth Ventricle (Dorsal Medulla) Spinal Canal Occipital Cortex
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Ventral Surface Structures and Cranial Nerves Olfactory Bulb Optic Nerve Optic Chiasm Infundibulum Optic Tract Oculomotor Nerve Pyriform Cortex Temporal Cortex Rhinal Fissure Pyriform Cortex Mammillary Bodies Trigeminal Nerve
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Neuroanatomy - Lateral View of the Sheep Brain Dorsal...

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