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Doctor insights on: Nerve Impulse Transmission

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Describe how a nerve impulse is transmitted along to axon?

Describe how a nerve impulse is transmitted along to axon?

It's complex: 1. Polarization of the neuron's membrane; 2. Resting potential gives the neuron a rest; 3. Action potential: sodium ions move inside the membrane; 4. Repolarization: potassium ions move outside, and sodium ions stay inside the membrane; 5. Hyperpolarization: more potassium ions are on the outside than there are sodium ions on the inside; 6. Refractory period puts everything back to normal. ...Read more

Nerve (Definition)

The brain and spinal cord communicates with what is occurring in the internal organs and limbs by nerve fibers where are like electrical wires with insulation (myelin) and the "copper" (axon). Within brain and spinal cord these nerves connect to other nerves via synapses on both axons and dendrites. A nerve can carry information regarding sensations, and ...Read more


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Describe what is nerve impulse?

Describe what is nerve impulse?

Electrical transmiss: Information travels down a nerve as an electrical impulse. At the end of the nerve, the connection with nerves, muscles or glands is called a synapse, by chemicals called transmitters. ...Read more

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Can you tell me how a light touch stimulates a nerve impulse?

Can you tell me how a light touch stimulates a nerve impulse?

All Feeling: has to travel through nerves. You can't feel anything without the nerves, so any sensation felt is due to nerves that send signals to spinal cord and brain. ...Read more

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What factors influence the time necessary for a nerve impulse to be transmitted?

What factors influence the time necessary for a nerve impulse to be transmitted?

Milliseconds: Nerve impulses in arms and legs typically travel at speeds over 40-50 meters/sec, as measured by EMG equipment. Nerve size, local temperature, chemical balance, especially sodium and potassium, can all affect appropriate nerve velocity speeds. ...Read more

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If the immune system attacked killed the neurons cell body axons dendrites nerves throughout the body is it possible and what diagnosis would this be?

If the immune system attacked killed the neurons cell body axons dendrites nerves throughout the body is it possible and what diagnosis would this be?

Complicated: This description is quite improbable and sounds as it the person may be deceased. If you are having neurological deficiencies stronglysuggest that you see a neurologist and be evaluated. Good luck. ...Read more

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With peripheral neuropathy, what conditions could cause damage to both axons and myelin as shown in nerve conduction tests? And can it be reversed?

With peripheral neuropathy, what conditions could cause damage to both axons and myelin as shown in nerve conduction tests? And can it be reversed?

Brief explanation: Most neuropathies affect myelin coverings (Schwann cell), but an advancing axonal neuropathy can secondarily affect the myelin. This is not simple, and you would be far better served by a Concierge consult, and/or find an experienced Medical School neurologist. Reversibility depends on causes and appropriate therapy. ...Read more

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What exactly is brain neurophysiology and how does it change in an addiction?

What exactly is brain neurophysiology and how does it change in an addiction?

Biology of the brain: There are areas of the brain that become more active due to addictions. Neurophysiology can study the activity of these areas via eeg, mmg, fmri or other monitoring methods. ...Read more

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