Presentation is loading. Please wait.

Presentation is loading. Please wait.


Similar presentations

Presentation on theme: "CENTRAL NERVOUS SYSTEM"— Presentation transcript:

Dissection of the Sheep Brain Including Midsagittal, Dorsal and Ventral Sections

2 Dorsal View – Whole Brain
Longitudinal Fissure Cerebrum Sulci Gyri Corpora quadrigemina Sulci (sing. sulcus) – grooves between ridges Gyri (sing. gyrus) – ridges Cerebellum Medulla oblongata Spinal cord

3 Dorsal View – Pineal Body & Corpora Quadrigemina
Superior colliculi Inferior colliculi

4 Ventral View - Anterior
Olfactory bulb Olfactory tract Cerebrum Pituitary gland

5 Ventral View – Optic Nerve and Chiasma
Optic nerves Optic chiasma (dura mater partially removed) (dura mater intact)

6 Ventral View - Posterior
Cerebellum Dura mater Medulla oblongata Spinal cord

7 Ventral View Without Pituitary
Dura mater Cerebrum Hypothalamus Midbrain Mammillary body Pons Medulla oblongata Spinal cord

8 Ventral View Without Pituitary – Cranial Nerves
Olfactory bulbs Optic nerves Olfactory tract Optic chiasma Optic tracts Trigeminal nerve (V)

9 Midsagittal Section: Cerebrum and Cerebellum
Parietal lobe Occiptal lobe Cerebellum Cerebrum Arbor vitae Fornix Frontal lobe Cerebrum consists of two hemispheres, each with 4 lobes: frontal, parietal, occipital, and temporal (lateral view) corpus callosum -commissural fibers joining right and left hemispheres fornix - connects ??? Cerebellum - consists of folia (folds) of gray matter arbor vitae - white tracts in cerebellum Ventricles - filled with cerebrospinal fluid (CSF) lateral - within cerebral hemispheres fourth - between cerebellum and pons Corpus callosum Fourth Ventricle

10 Midsagittal Section: Diencephalon - Thalamus & Epithalamus
Third ventricle Pineal body Diencephalon consists of epithalamus (pineal body and choroid plexuses of 3rd ventricle), thalamus Thalamus Intermediate Mass

11 Midsagittal Section: Diencephalon - Hypothalamus
Mammillary body

12 Midsagittal Section: Brain Stem
Corpora quadrigemina Fourth ventricle Pons Medulla oblongata Midbrain Cerebral aqueduct

13 Midsagittal Section: Cerebellum and Spinal Cord
Arbor vitae Central canal Spinal cord


Similar presentations

Ads by Google