Forebrain , Science

Assignment Help:

Forebrain:

The largest part of  the brain that you  see in Fig. is the cerebrum. It consists of  two halves or hemispheres  joined  together by  a band of  nerve fibres. Interestingly the crossing over of nerve fibres here causes the right half  to control the actions.of  the left side of the body and vice versa. The outer surface of  the cerebrum is  the cerebral cortex.  It is often referred to as the  'grey matter' because of  its colour. It is profusely supplied with blood vessels. The cortex was explored in a very fascinating way, particularly by a Canadian neuro- surgeon, Wilder Penfield: Since 1900's it was known that the brain cpntained no pain :ceptors and.hence  it could be operated upon, without making the person unconscious: local anesthesia, the top of  the skull could be removed  like a cap to expose the cortex. Penfield did exactly this and he stimulated different parts of the cortex, one by one, by matching  them with an electric wire or probe. He was amazed to observe the reactions of the dtients. On touching one part of  the cortex with the probe, the patients could see, hear or nell or feel! Patients could revive old memories. Some reported hearing the sound of a articular song; one woman felt as if  her daughter was in  the room talking to her; another. erson could actually recollect the smell of  flowers! Stimulation of  other regions caused notor responses such as the movement of  an arm or leg.  

1649_Forebrain.png


Related Discussions:- Forebrain

Decline of european science, Decline of european science: By the middle...

Decline of european science: By the middle of  the second century B.C., the Greek empires were collapsing in  anarchy andunder the weight of  the more vigorous power of Rome. I

Making a ''burp'' bottle, Making a 'burp' bottle Fit a bottle or flask ...

Making a 'burp' bottle Fit a bottle or flask with a single-hole stopper which carries a funnel. Put the stopper firmly in the bottle and then pour water into the funnel. The bo

Explain major histocornpatability complex (mhc), Explain Major Histocornpat...

Explain Major Histocornpatability Complex (MHC) Major histocompatability complex is also known as the Human Leukocyte Antigen (HLA). MHC molecules are important components of t

Define caecum - part of large intestine, Define Caecum - Part of Large Inte...

Define Caecum - Part of Large Intestine This is the first part of the colon. Ileocolic valve opens from the ileum on the medial aspect of the caecum. The vermiform appendix is

Explain the nuclei or ganglia, Explain the Nuclei or Ganglia Deep withi...

Explain the Nuclei or Ganglia Deep within the cerebral hemispheres are groups of nerve cells called nuclei or ganglia which act as relay stations, where impulses are passed fro

Humans, why do we breathe?

why do we breathe?

Define inzmunoglobulin d - classification of antibodies, Define Inzmunoglob...

Define Inzmunoglobulin D - classification of antibodies Present on surface of B lymphocytes, along with IgM plays a role in Ag recognition.

Principle colorimetric method for estimation of phosphorous, Define Princip...

Define Principle Colorimetric Method for the Estimation of Phosphorous? The proteins in the blood are precipitated with the help of trichloroacetic acid. The protein free filtr

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd