Biology 351
Sheep Nervous System
Diencephalon.
Epithalamus
Pineal
Habenula
Thalamus
Hypothalamus
Optic nerve, II
Optic chiasma
Hypophysis
Infundibulum
Mamillary bodies
Telencephalon.
Cerebral hemispheres
Corpus collosum
Gyri
Sulci
Olfactory bulbs
Olfactory nerve, I
A = Gyri (ridges) B = Sulcus (fissure) Circled = Cerebral hemisphere
I = Olfactory nerve (diffuse) C = Olfactory bulbs
E = Corpus collosum
A = Gyri (ridges) B = Sulcus (fissure) Circled = Cerebral hemisphere
A = Optic chiasma B = Infundibulum C = Pituitary II = Optic nerve
Pituitary removed A = Optic chiasma B = Infundibulum C = Mamillary body Hypothalamus is from the optic chiasm to mamillary body. II = Optic nerve
D = Thalamus (roof = epithalamus) E = Pineal F = Mammillary body G = (ignore)
A = Optic chiasma B = Infundibulum C = Pituitary II = Optic nerve
III = Oculomotor nerve IV = Trochlear nerve
A = Cerebral peduncles III = Oculomotor nerve IV = Trochlear nerve
Cerebellum has been pulled back. B = Superior colliculi C = Inferior colliculi D = Corpora quadrigemina
III = Oculomotor nerve IV = Trochlear nerve
A = Pons V = Abducens, Nerve VI
A = Pons V = Abducens, Nerve VI
E = Vermis
A = Pons V = Abducens, Nerve VI
Mesencephalon.
Tectum
Corpora quadrigemina
Superior/inferior colliculi
Trochlear nerve, IV
Tegmentum
Cerebral peduncles
Oculomotor nerve, III
Metencephalon.
Cerebellum
Vermis
Hemispheres
Gray matter
White matter/ arbor vitae
Pons
Abducens, VI
A = Medulla oblongata VI= Abducens VII= Facial nerve VIII= Auditory nerve IX = Glossopharyngeal nerve X = Vagus XI = Accessory nerve XII = Hypoglossal
Unlabeled. (Practice)
A = Medulla oblongata VI= Abducens VII= Facial nerve VIII= Auditory nerve IX = Glossopharyngeal nerve X = Vagus XI = Accessory nerve XII = Hypoglossal
Myelencephalon.
Medulla oblongata
Fourth ventricle
Abducens, VI
Facial nerve, VII
Auditory (vestibulocochlear) nerve, VIII
Glossopharyngeal nerve, IX
Vagus, X
Accessory nerve, XI
Hypoglossal, XII
Model dissections.
Nerves are labeled in RED.