Tag: midbrain

Show Posts in

Brain Stem Unlabeled

The brain stem of the sheep is located on the ventral surface of the brain. Visible features include the olfactory lobe, optic chiasma, pituitary stalk (infundibulum), midbrain, pons, medulla oblongata and the spinal cord.   The image below shows the brain of the sheep with the dura mater removed.

Superior Colliculus

The superior colliculus is part of the midbrain, also known as the tectum in non-mammalian vertebrates.  This area of the brain directs behavioral responses, particularly how the eyes respond to stimulus and the corresponding movement of the head and neck. If you are looking for this structure in …

Brain – Optic Chiasma

On the ventral side of the sheep’s brain, several nerves and structures are visible after the careful removal of the dura mater.   The image below shows the brain with the dura intact and the eye socket attached.  The blue reflective surface of the sheep tapetum can be …

Brain – Pineal Gland

The pineal gland (also called pineal body) is located in the midbrain and is one of the few non-paired structures of the brain.     The pineal gland is part of the endocrine system and produces the hormone melatonin.  Melatonin is associated with sleep patterns and circadian rhythms. …