18 Questions
What kind of sensations can occur in a phantom limb?
Both tingling and intense pain
Which body part can a phantom sensation spread to during sexual arousal?
Genitals
How can painful phantom sensations be relieved?
By learning to use an artificial limb
What happens when a person loses peripheral vision?
They start to move their head from side to side
What happens to the brain areas after decades without normal input?
They retain their original properties
What can cause damage to the sensory nerves from a forelimb to the spinal cord?
A spinal cord injury
What effect do cannabinoids (marijuana) have on the brain after a stroke?
They decrease the release of glutamate.
What is one evolutionary explanation for human goosebumps?
They are a remnant of a protective mechanism from our hairy ancestors.
How can serum albumin help reduce morbidity in patients with acute stroke?
By reducing the volume of infarct and edema.
What is the role of astrocytes in scar tissue?
They release chemicals that keep nearby neurons alive.
What is the relationship between the frontal parts of the brain and impulse control?
The frontal parts of the brain inhibit impulses.
What role does the entorhinal cortex play in relation to the hippocampus?
It sends input to the hippocampus.
What happens when axons from the entorhinal cortex of one hemisphere are damaged?
Axons from the other hemisphere sprout and take over vacant synapses, restoring behavior.
What occurs when the entorhinal cortex is damaged in both hemispheres?
Axons from other locations sprout, conveying different information, interfering with behavior.
What is denervation supersensitivity, and how does it help compensate for decreased input?
It is a process where receptors become more sensitive to a neurotransmitter due to decreased input.
What happens when axons to the muscles of the eye regenerate but attach incorrectly?
Both b and c are correct.
What happens to cortical information that previously responded to information from a specific finger after amputation?
It is lost after amputation.
What is responsible for pain in the context of treatments that facilitate the regrowth of axons in a damaged spinal cord?
All of the above.
Test your knowledge on how axons from the entorhinal cortex and other brain regions can sprout to restore or interfere with behavior after brain damage. Explore concepts of axon regeneration and synaptic connections in the brain.
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