Question

multiple choice question

what is an intrinsic muscle?

a muscle that appears to emerge directly from the bone with no visible gap or tendon
a muscle that holds a bone still during a particular movement
a muscle that arises from one region, but acts upon a different region
a muscle that is contained entirely within one region of the body

Explanation:

Define intrinsic muscle

An intrinsic muscle is anatomically defined as a muscle that has both its origin and insertion contained entirely within a single, specific region of the body (such as the hand, foot, or tongue). This means it acts locally within that region.

Analyze the given options

• Option 1: "A muscle that appears to emerge directly from the bone with no visible gap or tendon" describes a direct (fleshy) Muscle Attachment.
• Option 2: "A muscle that holds a bone still during a particular movement" describes a fixator muscle.
• Option 3: "A muscle that arises from one region, but acts upon a different region" describes an extrinsic muscle (for example, forearm muscles that control finger movements).
• Option 4: "A muscle that is contained entirely within one region of the body" perfectly matches the definition of an intrinsic muscle.

Answer:

• A muscle that appears to emerge directly from the bone with no visible gap or tendon
• A muscle that holds a bone still during a particular movement
• A muscle that arises from one region, but acts upon a different region
• A muscle that is contained entirely within one region of the body (Correct answer)