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

Objectives of accidents and first aid, Objectives After studying this u...

Objectives After studying this unit, you should be able to: 1.  explain the need for reporting lab accidents, 2.  state the accident reporting procedure, 3.  list the

Requirements for sterilization of glassware , Requirements Glassware li...

Requirements Glassware like flask, petri plates, test tubes, pipettes isi infect ant Cleaning brush Liquid soap solution Bucket Enamel tray/steel tray Aluminium

Explain undifferentiated cells in an organism, Explain Undifferentiated Cel...

Explain Undifferentiated Cells in an Organism These cells are capable of undergoing division and development, for example, the stem cells (animals) and meristematic cells (plan

Control of soil erosion, Control of soil erosion: The most significant ...

Control of soil erosion: The most significant measures of erosion control  include (i) growth of grasses, shrubs and trees on soils and (ii) construction of a drainage system w

What is immunity, What is Immunity? Amino acids are involved in giving...

What is Immunity? Amino acids are involved in giving immunity by maintaining the vulnerable surfaces of the body in such a way so as to resist infections. Most of the external

Explain length-tension relationship, Explain Length-Tension Relationship ...

Explain Length-Tension Relationship The force of contraction of cardiac muscle is directly proportional to the initial length of the muscle fibers. This is known as the Starlin

Requirements earthing in an appliance, Requirements Cell holder - 1 ...

Requirements Cell holder - 1 Bulb holder - 1 Wire - 1 Bulb (2.0 V) - 1 Cells (1.5 V) - 2 Plug (6/ 16 A) - 1 Screw driver - 1 Crocodile clips - 4 pair

Parallel linear grooves are sometime worn into the rock, As glaciers erode ...

As glaciers erode the surface over which they move, sets of parallel linear grooves are sometime worn into the rock surface. These grooves are known as: Striations

Boobs, why are boobs fluffy

why are boobs fluffy

Explain the mucous membrane, Explain the Mucous Membrane This layer is ...

Explain the Mucous Membrane This layer is lined by the epithelial cells. Parts of the tract which are subject to mechanical injury, the layer consists of stratified squamous ep

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