Bonpoc 17 What nuclei and how many are located in the anterior horns of the spinal cord? a. Proper nuclei; b. Five motor nuclei (two lateral, two media I and one central). c. Thoracic nuclei.

The correct answer is b. Five motor nuclei (two lateral, two medial and one central).<br /><br />The anterior horns of the spinal cord contain motor nuclei, which are clusters of nerve cell bodies that send their axons out to innervate muscles. There are five pairs of motor nuclei in the anterior horns of the spinal cord:<br /><br />1. Two pairs of lateral motor nuclei: These nuclei are located in the lateral part of the anterior horn and are responsible for innervating the skeletal muscles of the limbs and trunk.<br />2. Two pairs of medial motor nuclei: These nuclei are located in the medial part of the anterior horn and are responsible for innervating the muscles of the trunk and some muscles of the limbs.<br />3. One pair of central motor nuclei: These nuclei are located in the center of the anterior horn and are responsible for innervating the muscles of the face and neck.<br /><br />Therefore, the correct answer is b. Five motor nuclei (two lateral, two medial and one central).