Sperry (Biological Area)

Question 1

Main Functions of the Left & Right hemisphere of the Brain

Answer 1

Left = language, reasoning and logical thought
Right = creativity, imagination and spacial awareness

Question 2

Sperry Aim

Answer 2

To show the independent streams of conscious awareness possessed by each hemisphere and to show how each hemisphere has its own memories.

Question 3

Sperry IV

Answer 3

Having a split brain or not.
Participants with split-brain had already undergone hemisphere reconnection to reduce severe epilepsy. There was no actual control group necessary for comparison in the study because the functions and abilities of the visual fields and hemispheres in non split-brain individuals was already known

Question 4

Sperry DV

Answer 4

The participants ability to perform a variety of visual and tactile tests

Question 5

Sperry Sample

Answer 5

11 patients who had undergone an operation to sever their corpus colosseum for treatment of epilepsy. There are operations took place at a range of times from the earliest being 5 years ago

Question 6

Sperry Visual test

Answer 6

The participant centered their gaze on a screen. A visual stimulus appeared on the screen for a 1/10 of a second. Everything that was projected to the left of the screen is passed via the left visual field to the right hemisphere and vice versa

Question 7

Sperry Tactile test

Answer 7

Below a screen there was a gap so that participants could reach the objects but not see them. The objects were placed in either the participants left or right hand or both hands. The information about the objects placed in the left hand is processed by the right hemisphere and vice versa

Question 8

Sperry Visual Test Results

Answer 8

Information shown and responded in one visual field could only be recognised again if shown to the same visual field. Information presented to the Right visual field can be described in speech. If the same information was presented to the Left visual field the participant said they did not see anything. However the participant could point with his left hand to a matching picture of the object

Question 9

Sperry Tactile Test Results

Answer 9

Objects placed in the right hand could be described in speech and writing. If the same objects were placed in the left hand, participants could only make wild guesses and they often seemed unaware they holding anything. When two objects were placed simultaneously in each hand and then hidden in a pile of objects.

Question 10

Sperry Conclusions

Answer 10

People with split brains have two separate visual processors each with its own train of visual images.

Split brain patients have a lack of cross integration

Split brain patients seem to have two independent streams of consciousness each with its own memories, perceptions and impulses for example two minds in one body