Sheep Brain Dissection

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Sheep Brain Dissection

• PSY 290S
• 2004
• Dr. Alison Fleming

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Gross Neuroanatomy

• general structures and connections visible to the
  naked eye

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Brain Protection

• Skull
• Meninges
• Dura mater (hard)
• Arachnoid (blood vessels)
• Pia mater (thin and attached)
• Cerebrospinal fluid
• Preservation - formalin

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Orientation

• Dorsal or superior view

Caudal or posterior
Rostral or anterior
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Orientation

• Lateral view

Ventral
Dorsal
Caudal or posterior
Rostral or anterior
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Orientation

• Ventral or inferior view

lateral
medial
medial
lateral
Caudal or posterior
Rostral or anterior
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• Gyrus the protruding rounded surface
• Sulcus the enfolded regions that appear as
  lines and creases (fissure)

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Notice that nerves appear white as oppose to the
grayish appearance of the rest of the brain
Optic tract
Optic chiasm
Hypothalamus
Olfactory bulbs
Pons
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Inferior colliculi
Superior colliculi
Pineal gland
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cortex
midbrain
Thalamus gateway to the cortex
cerebellum
Cingulate cortex
Pineal gland
Spinal cord
fornix
Corpus collosum
Optic chiasm
Medulla
Pons
Hypothalamus
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hippocampus
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White vs. Gray Matter
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Basal Ganglia
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Corpus collosum
Hippocampus
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