Posterior triangle of the neck which divides the space into two triangles: A) Nerves and plexuses: B) Vessels: C) Lymph nodes: D) Muscles: The accessory nerve (CN XI) is particularly vulnerable to damage during lymph node biopsy. Damage results in an inability to shrug the shoulders or raise the arm above the head, particularly due to compromised trapezius muscle innervation. The Internal jugular vein's superficial location within the posterior triangle also makes it vulnerable to injury. Posterior triangle of the neck The posterior triangle (or lateral cervical region) is a region of the neck. It has the following boundaries: Apex: Union of the sternocleidomastoid and
Off-the-Neck Historic District the principal state road leading northward from the village of Castine, which is located at the end of a large peninsula defined by Penobscot Bay on the west and the Bagaduce River on the east. The village proper is located on the Bagaduce Peninsula, which is separated from the larger peninsula by a neck of land between Wadsworth Cove and Hatch Cove. From this neck, SR 166 runs roughly north-by-northeast, paralleling the Bagaduce River up to a junction with Maine State Route 199. SR 166A runs follows a more northerly course, beginning just north of the neck and paralleling the