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Nerves
Nerves are thread-like structures that form a network of pathways that transmit information from the brain to the body and the body to the brain, in the form of electrical impulses.
1,605 Questions
What is another name for the sheath of schwann?
another name for the sheath of schwann is neurilemma.
What is an auditory startle response?
The ASR is the change in behavior in reaction to either a surprise or prepared acoustic event. This change can be immediate or long lasting,
Can sitting on a stool cause peroneal nerve injury?
Well I suppose yes cause one can damage th CPN by having presure on fibular head in lithotomy position or even while sitting on stool Well I suppose yes cause one can damage th CPN by having presure on fibular head in lithotomy position or even while sitting on stool
Does saltatory conduction occur on unmyelinated axons?
No.
I advise you to look up what saltatory conduction is so you will understand why not rather than coming here to get the answers to your homework.
Medial Antebrachial
Why might you think a nerve cell in your leg be a meter long?
Cells come in many sizes. They all aren't the same
The effector cell responds to a nerve impulse and can be either a muscle cell or a gland cell.
What causes Pins and needles in arms during sleep?
Sometimes it happens when a limb has had a shortage of circulation for a while, and then the circulation is restored. You might be in a position where you are resting on a limb in such a way that circulation is interrupted. As a child, I remember one night when I reached under the pillow and felt a strange hand under the pillow! I almost tossed my cookies. It only took a moment to realize that one hand had gone completely numb under the pillow, so my brain didn't get the message that the hand under the pillow was mine.
What carries impulses toward the nerve cell body?
Short branched extensions that carry impulses towards the nerve cell body are called dendrites.
Does the right half of the cerebrum controls the right side of the body?
The left side of the body. And vice versa.
Where are the cell bodies for the second order neurons located?
Second order neuron cell bodies reside in the dorsal horn of the spinal cord.
Saltatory conduction is made possible by gaps in the myelin sheath (called nodes of Ranvier) along the axon, which allow for the action potential to "jump" from one node to the other, increasing conduction velocity.
Is it the synaptic cleft that contains vesicles filled with acetylcholine?
The synaptic knob contains vesicles filled with neurotransmitters. Therefore, Acetylcholine is the neurotransmitter that stimulates skeletal muscle to contract. It is released into the synaptic clefts between motor neuron axons and motor end plates.
How do you get IV characteristic of neuron?
Electrophysiology is the study of the electrical properties of biological cells and tissues.Explain how you can actually use your experience of carrying out "researh" work in this experiment to get IV characteristic of a NEURON
refractory period
Why is there no muscle atrophy in upper motor neuron lesions?
An UMN lesion may in fact present with atrophy, but it does so over time.
With a LMN lesion, the muscle loses its innervation directly and thus will not be receiving any neurological stimulus at all. However, damage to an UMN leaves the corresponding LMN to that particular muscle intact, thus leaving it to fire somewhat irregularly, but firing nonetheless. Macroscopically the muscle is no longer under central control and thus can't perform proper function, but microscopically the muscle fibers are still receiving some neurological input, or signal from the LMN innervating it, thus the muscle integrity appear unaffected at first. Over time, the muscle will atrophy because of a lack of use, but this happens more gradually than with a direct LMN lesion.
-Onyx (Medical Student)
