The Source of the Electrical Potentials Recorded from the Scalp

question 51

Multiple Choice

The source of the electrical potentials recorded from the scalp of a subject is

• A) the natural flow of electrical current along the outer cell layers of skin.
• B) the signals generated by the contraction of muscle fibers that lie under the scalp.
• C) the summated activity of nerve cell action potentials and postsynaptic potentials.
• D) the signals generated by the activity of the sweat glands in response to stressors.
• E) movement of ions generated by magnetic currents.

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Definitions:

Dorsogluteal Injection Site

A location on the buttocks where injectable medications can be administrated into the muscle.

Intramuscular Injections

Intramuscular injections involve administering medication deep into the muscles, allowing the drug to be absorbed into the bloodstream more quickly than with subcutaneous injections.

Intravenous (IV) Bolus

A rapid delivery of medication or fluid directly into the bloodstream through an IV line.

Inner Forearm

The inner forearm is the lower portion of the arm on the side opposite the elbow, commonly used as a site for patch testing due to its sensitive skin.