If We Pick Up Two Rocks,one That Weighs 1 Pound

question 179

Essay

If we pick up two rocks,one that weighs 1 pound and one that weighs 2 pounds,we can easily notice the difference in weight.But if we pick up two rocks,one that weighs 21 pounds and one that weighs 22 pounds,we probably can't tell the difference.Use the principles of psychophysics to explain this

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Definitions:

Subarachnoid Space

The area between the arachnoid membrane and pia mater around the brain and spinal cord, filled with cerebrospinal fluid.

Meninges

The three layers of protective tissue, the dura mater, arachnoid mater, and pia mater, that enclose the brain and spinal cord.

Arachnoid Mater

A delicate membrane, one of the three layers of the meninges, located between the dura mater and the pia mater, surrounding the brain and spinal cord.

Central Sulcus

A prominent groove on the surface of the brain, separating the frontal and parietal lobes.