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abducens nerve (CN VI), adenohypophysis (intermediate part), adenohypophysis (residual cavity), area of spinal tract of trigeminal nerve (CN V), basilar artery, cerebral hemisphere, cochlea, distal part of adenohypophysis, dorsum sellae, ectomeninx, endolymphatic duct, endomeninx, exoccipital bone, geniculate ganglion (CN VII), internal carotid artery, junction of rhombocoel (fourth ventricle) and surface ectoderm, lateral semicircular canal, mantle zone, medial lemniscus area, medulla oblongata, middle meningeal artery, motor root of trigeminal nerve (CN V), neopallial cortex, neurohypophysis, oculomotor nerve (CN III), ophthalmic nerve (CN Vā‚), optic chiasma, optic nerve (CN II), orbitosphenoid, osteogenic membrane, otic capsule, posterior semicircular canal, pre-otic sinus, primordial inferior olivary nucleus, primordial nucleus cuneatus, primordial nucleus gracilis, pyramidal tract area, remnant of optic stalk lumen, roof of orbit, root of accessory nerve (CN XI), root of glossopharyngeal nerve (CN IX), root of vagus nerve (CN X), sigmoid sinus, temporalis muscle, trigeminal ganglion (CN V), trochlear nerve (CN IV), utricle, vestibulocochlear ganglion (CN VIII)

A section through the cerebral hemispheres, optic nerve, optic chiasma and medulla oblongata.

Observe:
1. The adenohypophysis caudal to the optic chiasma and medial to the internal carotid artery and trigeminal ganglion.
2. The relative position, parts and relation of the cochlear and vestibular portions of the internal ear.
3. The trigeminal, geniculate and vestibular ganglia.
4. The primordial nuclei and tract areas in the medulla oblongata where the fourth ventricle is continuous with the central canal.
5. The roof of the orbit and its relation to the orbitosphenoid bone.


Keywords: abducens nerve (CN VI), adenohypophysis (intermediate part), adenohypophysis (residual cavity), area of spinal tract of trigeminal nerve (CN V), basilar artery, cerebral hemisphere, cochlea, distal part of adenohypophysis, dorsum sellae, ectomeninx, endolymphatic duct, endomeninx, exoccipital bone, geniculate ganglion (CN VII), internal carotid artery, junction of rhombocoel (fourth ventricle) and surface ectoderm, lateral semicircular canal, mantle zone, medial lemniscus area, medulla oblongata, middle meningeal artery, motor root of trigeminal nerve (CN V), neopallial cortex, neurohypophysis, oculomotor nerve (CN III), ophthalmic nerve (CN Vā‚), optic chiasma, optic nerve (CN II), orbitosphenoid, osteogenic membrane, otic capsule, posterior semicircular canal, pre-otic sinus, primordial inferior olivary nucleus, primordial nucleus cuneatus, primordial nucleus gracilis, pyramidal tract area, remnant of optic stalk lumen, roof of orbit, root of accessory nerve (CN XI), root of glossopharyngeal nerve (CN IX), root of vagus nerve (CN X), sigmoid sinus, temporalis muscle, trigeminal ganglion (CN V), trochlear nerve (CN IV), utricle, vestibulocochlear ganglion (CN VIII)

Source: Atlas of Human Embryos.