What are the parts of a sheep brain?

Arachnoid mater: the middle of the three protective layers of meninges surrounding the brain and spinal cord. Cerebellum: controls balance and muscle coordination; located caudal to the cerebrum in the sheep brain. Cerebrum: largest portion of the mammalian brain; two hemispheres separated by the longitudinal fissure.

Does the sheep brain have fornix?

The fornix arises from a band of fibers, the fimbria, which runs along the medial surface of the hippocampus. (Both fimbria. and hippocampus will be seen later.) One fornix is connected to the other by transverse fibers called the commissure of the fornix, or hippocampal commissure.

What part of the sheep brain is the rounded part of the brain stem?

The most prominent feature of the brain is the cerebrum – which is divided into nearly symmetrical left and right hemispheres by a deep longitudinal fissure. 4. The smaller, rounded structure at the back of the brain is the cerebellum.

Where is the hippocampus in a sheep brain?

temporal lobe
Therefore, to help students understand the organization of the hippocampal system the dissected specimen needed to clearly illustrate that the hippocampus proper is located within the temporal lobe and is an arched structure that forms the caudal (posterior) portion of the floor of the lateral ventricle.

What is the anterior commissure?

The anterior commissure (also labeled ac) is a large bundle of crossing fibers, which connects the olfactory bulb and parts of the cerebrum to the same areas on the opposite side.

Does a sheep brain have gyri and sulci?

The largest structure in the dorsal view is the cerebral cortex, the covering of the cerebrum. The cortex is folded upon itself, with a number of gyri (hills, one is called a gyrus) and sulci (valleys, one is called a sulcus).

What does it mean for the sheep brain to be oriented anterior to posterior?

The sheep spinal cord is orientated anterior to posterior, as in any four-legged animal. The human spinal cord is orientated superior to inferior. This orientation difference has a major affect on the location of the brain stem. The sheep brain stem is located more towards the rear (posteriorly).

What structural differences are there between the sheep and human cerebellum?

The cerebrum is more elongated in sheep than in humans, and the cerebellum and brain stem are located behind the cerebrum, instead of being tucked below it. This is because sheep, being four-legged animals, have a horizontal spine, while humans stand upright with their spines vertical.