Lab 3 Laitman Prep

At the union of its dorsal and ventral roots as it leaves the intervertebral foramen.

Ribs 11-12. Not attached to sternum.

Synovial joint (most movable). Name is called costovertebral joint.

Lactiferous sinuses.

Allow the breast some movement, and isolation of infection from the chest. (Retromammary space - separates pectoralis major muscle from breast)

Cephalic vein (superficial vein of upper limb - arm). Drains into axillary vein (from lateral part of body into heart).

• direct branch of the subclavian on both the right and left sides.
• Other arteries from the subclavian are the vertebral artery, thyrocervical trunk, costocervical trunk, dorsal scapular artery, and the axillary artery (VITAmin C&D)

Along the underside of their associated rib in the intercostal space. In order to avoid damaging vessels, chest tubes need to be inserted into the bottom of the intercostal space, along the top surface of the inferior rib.

From their positions relative to the brachial plexus. However, the medial pectoral nerve pierces the pectoralis minor LATERAL to the lateral pectoral nerve, which runs between the pectoralis major and minor. Both nerves innervate both muscles.

• External intercostals fibers run from the superiolateral to inferiomedial (i.e. “hands in pockets”); the
• internal intercostals run from the inferiolateral to the superiomedial (i.e. “hands on hips”). V shape overall