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
The roots and trunks enter the posterior triangle of the neck by passing
assistant
The correct answer is  The roots and trunks enter the posterior triangle of the neck by passing between the anterior scalene and middle scalene and lie posterior & superior to subclavian Artery.