system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
What are root values of nerve supplying muscle needed for latter pa of the following action?
assistant
The correct answer is  Serratus Anterior is responsible for the latter pa of abduction along with trapezius. The long thoracic nerve (Nerve of Bell) originates from the C5-C7 roots and descends in the axilla, posterior to the brachial plexus, to innervate the serratus anterior muscle.