Published online Apr This is an Open Access article:
List and describe the principal structures of the sheep brain 2. Identify important parts of the sheep brain in a preserved specimen Materials: Dissection tools and trays, lab glasses, lab gloves, preserved specimen External Sheep Brain: The sheep brain is quite similar to the human brain except for proportion.
The sheep has a smaller cerebrum. Also the sheep brain is oriented anterior to posterior whereas the human brain is superior to inferior. The tough outer covering of the sheep brain is the dura mater, one of three meninges membranes that cover the brain.
You will need to remove the dura mater to see most of the structures of the brain. Remove the dura mater while leaving other structures intact. 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.
The surface of the cerebrum is covered with large folds of tissue called gyri. The grooves between the gyri are sulci. The deeper sulci are often termed fissures. The fissures are used as landmarks to divide the surface of the cerebrum the cerebral cortex into regions: The smaller, rounded structure at the back of the brain is the cerebellum.
The cerebellum has smaller gyri that are roughly parallel to one another. Compare the gyri of the cerebellum to that of the cerebrum.
Removing the dura mater from the cerebellum can be tricky business. Look for areas on the side of the brain that you can snip to peel the dura mater off.
Turn the brain over so that the cerebrum is down. Locate the optic chiasma.
The pituitary gland is a large round structure under the chiasma. If you removed this area with the dura mater, you may need to replace it to see the chiasma and pituitary gland. Toward the front of the brain are two prominent round structures, the olfactory bulbs.
Toward the back of the brain are bulges that indicate the midbrain, the pons, and the medulla.A Study of the Genetic Analysis of Brain Disorders The safety and scientific validity of this study is the responsibility of the study sponsor and investigators.
Listing a study does not mean it has been evaluated by the U.S. Federal Government.
A meta-analysis of human amygdala volumes reveals no significant difference between the sexes. The study strengthens the case for gender similarity in the human brain and psychological abilities.
We performed digital expression analysis of brain-enriched genes across the human genome with a window size of 5 Mbp and an interval of 1 Mbp. The transcript density factor for normal (non-tumor) brain libraries (TDF NB) was calculated as described in Methods.
Analysis of the Human Brain Human Brain's Recognition of Objects The process is a mathematical comparison which equates to a comparison of graphs with label different features (Garey and. Johnson.
The human brain is a unique and complex structure; it facilitates vital and complicated physiological and psychological functions such as consciousness, mobility, emotion, and personality. Different parts of the brain are responsible for specific functions. A validation of the analysis in human brain tissue was performed according to the criteria for validation of analytical methods of the German Society of Toxicological and Forensic Chemistry (GTFCh).
The evaluation of the samples was performed using the software Valistad .