Biology 351
Squalus Nervous System
Diencephalon.
Structures:
Epithalamus (roof)
Thalamus (walls)
Hypothalamus (floor)
Epiphysis
Third ventricle
Optic chiasma
Infundibulum
Hypophysis (pituitary)
Nerves
Optic nerve, II
Mesencephalon.
Structures
Optic lobes/tectum (roof)
Tegmentum (floor)
Nerves
Oculomotor nerve, III
Trochlear nerve, IV
Telencephalon.
Structures
Superficial ophthalimic nerve
Olfactory sac
Olfactory tract
Cerebral hemisphere
Nerves
Terminal nerve, 0
Olfactory nerve, I
Metencephalon (cerebellum).
Structures
Body of cerebellum
Auricular lobes
Nerve
Trigeminal nerve, V
Myelecephalon
Structures
Medulla oblongata
Fourth ventricle
Nerve
Abducens, VI
Facial nerve, VII
Auditory nerve (vestibulocochlear nerve), VII
Glossopharyngeal, IX
Vagus, X
0 = Terminal nerve 1 = Olfactory nerve (diffuse) A = Olfactory sac B = Olfactory tract C = Cerebral hemispheres
0 = Terminal nerve 1 = Olfactory nerve (diffuse) A = Olfactory sac B = Olfactory tract C = Cerebral hemispheres
A = Epiphysis B =Thalamus C = Third ventricle (under the epithalamus)
D = hypothalamus E = optic chiasma F = infundibulum G = pituitary
A = Epiphysis B =Thalamus C = Third ventricle (under the epithalamus)
A = Optic lobe IV = Trochlear nerve
III = oculomotor nerve
A = Optic lobe IV = Trochlear nerve
A = Body of cerebellum B = Auricular lobes
V = Trigeminal nerve
A = Body of cerebellum B = Auricular lobes
A = Medullar oblongata B = 4th ventricle (black space)
VI = Abducens VII = Facial nerve VIII = Auditory nerve XI = Glossopharyngeal nerve X = Vagus nerve
VI = Abducens VII = Facial nerve VIII = Auditory nerve XI = Glossopharyngeal nerve X = Vagus nerve
A = Medullar oblongata B = 4th ventricle (black space)
A = Olfactory bulb B = Olfactory tract C = Cerebral hemispheres D = Epiphysis E = Thalamus. The space is the third ventricle. F = Optic lobe G = Body of cerebellum H = Auricular lobes J = Medulla oblongata (labeled "J" to not get mixed up with roman numeral 1) I = Olfactory nerve (diffuse) V = Trigeminal X = Vagus
Dissections
Structures
Medulla oblongata
Fourth ventricle
Nerve
Abducens, VI
Facial nerve, VII
Auditory nerve (vestibulocochlear nerve), VII
Glossopharyngeal, IX
Vagus, X
Nerves are labeled in RED.