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Why does the knee-jerk reflex still function in a person with a severed spinal cord and why is there no sensation of the stimulus?
Reflexes don't go up the spinal cord to the brain, as the body wants to remove itself from the stimulus as quickly as possible. So, it goes in a loop, called a reflex arc, where the sensory neurons detect the tap and the stimulus is so strong it immediately jumps to the motor neurons to make the leg jerk. It all happens in the spinal cord.
However, you don't feel it because the nerves going up (afferent) and down (efferent) the spinal cord to the brain have been severed and so the brain doesn't detect it.
What else can I help you with?
What function might be lost in the spinal cord is severed in an accident?
The use of the body below the level of the break.
What is the suturing of the ends of the severed nerve called?
Neurorrhaphy.
What is a severed arm?
severed means cut off
What is the most radical form of occipital nerve treatment?
In extreme cases where pain is frequent, the nerves can be severed at the point where they join the scalp. The person is pain-free, but sensation is permanently lost in the affected region of the head.
What is a severed leg?
a leg that has been cut, or 'severed', in half
When was A Severed Head created?
A Severed Head was created in 1961.
When was A Severed Wasp created?
A Severed Wasp was created in 1982.
When was The Severed Arm created?
The Severed Arm was created in 1973.
When was The Severed Man created?
The Severed Man was created in 2004.
When was Severed Fifth created?
Severed Fifth was created in 2008.
What is the duration of Severed Ways?
The duration of Severed Ways is 1.78 hours.
How many pages does A Severed Head have?
A Severed Head has 251 pages.
