Description:
Borders: A. Anterior: posterior border sternocleidomastoid muscle B. Posterior: anterior border trapezius muscle C. Base: clavicle; Floor: a. Semispinalis capitis muscle b. Splenius capitis muscle c. Levator scapulae muscle d. Posterior scalene muscle e. Middle scalene muscle f. Anterior scalene muscle g. Subclavian artery