Internal arcuate fibers of medulla comes from ?: (A) Dorsal nucleus of vagus, (B) Hypoglossal nucleus, (C) Nucleus of tractus solitariu, (D) Nucleus gracilis & cuneatus
Answer is D. Ans. is 'd' i.e., Nucleus gracilis & cuneatusThe nucleus gracilis and cuneatus give rise to the internal arcuate fibres.The fibres cross to the opposite side where they form a paramedian band of fibres, called the medial lemniscus. In the lemniscus, the body is represented with the head posteriorly and the feet anteriorly.