What fibers do alpha motor neurons innervate?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $9.99Unlock all

Prepare for the Lower Motor Apparatus Test with our comprehensive quiz. Enhance your understanding with flashcards and multiple-choice questions, each featuring hints and explanations. Ensure you're ready for your exam day!

Multiple Choice

What fibers do alpha motor neurons innervate?

Explanation:
Alpha motor neurons are the somatic motor neurons that directly cause muscle shortening. They innervate extrafusal skeletal muscle fibers, the fibers responsible for producing the force of movement. Inside the muscle spindle, intrafusal fibers set the sensitivity of the spindle and are innervated by gamma motor neurons, not alpha. Tendon cells are not the contractile fibers controlled by these neurons, and cardiac muscle fibers are regulated by the autonomic nervous system rather than alpha motor neurons.

Alpha motor neurons are the somatic motor neurons that directly cause muscle shortening. They innervate extrafusal skeletal muscle fibers, the fibers responsible for producing the force of movement. Inside the muscle spindle, intrafusal fibers set the sensitivity of the spindle and are innervated by gamma motor neurons, not alpha. Tendon cells are not the contractile fibers controlled by these neurons, and cardiac muscle fibers are regulated by the autonomic nervous system rather than alpha motor neurons.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy