NESC 4030 Sheep Brain Structure

Dorsal view

Left vs. right hemispheres

Rostral vs. caudal axis

Ventral view

Left vs. right hemispheres

Rostral vs. caudal axis

Lateral view

Dorsal vs. caudal axis

Rostral vs. caudal axis

• Trigeminal nerve (V)

Dorsal view

Left vs. right hemispheres

Rostral vs. caudal axis

Dorsal view

Rostral vs. caudal axis

• Cruciate/ansate sulcus

• Parietal lobe

• Frontal lobe

• Olfactory bulbs

Lateral view

Dorsal vs. ventral axis

Rostral vs. causal axis

• Spinal cord

• Medulla

• Pons

• Pyriform lobe

• Rhinal fissure

• Optic nerve

• Olfactory bulbl

• Insula

Caudal view

Cerebrum and cerebellum pulled apart

• Superior colliculi

• Inferior colliculi

• Corpora quadrigemina (part of midbrain tectum)

• Pineal body

• Superior colliculus

• Cerebellum

• 4th ventricle

• Medulla

• Spinal cord

Ventral view

Rostral vs. caudal axis

• Olfactory bulb (I)

• Optic nerve (II)

• Optic chiasm

• Optic tract

• Oculomotor nerve (III)

• Trigeminal nerve (V)

• Abducens nerve (VI)

Ventral view

• Olfactory bulb (I)

• Olfactory tract

• Pyriform area

Ventral view

• Infundibulum (removed)

• Mammillary body

• Cerebral peduncles

• Pons

• Trapezoid body

• Medulla

• Pyramids (part of medulla)

• Spinal cord

Midsagittal view

• Cingulate gyrus

• Hippocampal formation

• Fornix

• Mammillary body

• Optic chiasm

Midsagittal view

• Arbor vitae of cerebellum

• Superior colliculus

• Inferior colliculus

• Spinal cord

• Medulla

• Pons

• Midbrain

Midsagittal view

• Corpus callosum

• Pineal body

• Thalamus (massa intermedia)

• Hypothalamus

Midsagittal view

• Lateral ventricle/septum pellucidum

• Lateral ventricle (space)

• Cerebral aqueduct

• 4th ventricle

Coronal sections

• Cingulate gyrus

• Corona radiata

• Corpus callosum

• Lateral ventricle

• Head of the caudate nucleus

Coronal sections

• Cingulate gyrus

• Corpus callosum

• Lateral ventricle

• Head of the caudate nucleus

• Septum pellucidum

• Optic chiasm

Coronal sections

• Cingulate gyrus

• Corona radiata

• Corpus callosum

• Lateral ventricle

• Head of the caudate nucleus

• Putamen

• Globus pallidus

• Anterior commissure

• Optic chiasm

Coronal sections

• Cingulate gyrus

• Corona radiata

• Corpus callosum

• Lateral ventricle

• Tail of caudate nucleus

• Fornix

• Putamen

• 3rd ventricle

• Optic chiasm

Coronal section

• Cingulate gyrus

• Corpus callosum

• Lateral ventricle

• Fornix

• Thalamus

• 3rd ventricle

• Amygdala

• Hypothalamus

Coronal section

• Cingulate gyrus

• Corpus callosum

• Lateral ventricle

• Fornix

• Hippocampus

• 3rd ventricle

• Thalamus

Coronal section

• Cingulate gyrus

• Corpus callosum

• Lateral ventricle

• Hippocampus

• Thalamus

• Mammillary body

• Superior colliculus

• Cerebral peduncle

• Cerebral aqueduct

Ventral view

Removal of the dura

Left vs. right hemisphere

Doral vs. ventral axis

Coronal sections of the sheep brain (i.e., Where is dorsal vs. ventral? Where is left vs. right hemisphere?)

Arranged as brain is section from rostral end to caudal end

Laid out dorsal to ventral (right sight-up)

Right hemisphere is on left, left hemisphere is on right