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Anatomy tidbit- upper extremity/forearm
The distal radioulnar articulation is created when the ulnar notch of the radius moves around the articular circumference of the ulna. It provides the movements of supination and pronation. The main stabilizing element of the dital radioulnar joint (DRUJ) is an articular disk called the triangular fibrocatilage complex (TFCC). The TFCC is a fan shaped band of fibrous tissue that originates on the medial surface of the distal radius and traverses horizontally to insert on the ulnar styloid process. It rotates against the distal surface of the ulnar head during pronation and supination. It seperates the ulna and the carpal bones.
Anatomy tidbit- Brain'vasculature/veins
The internal cerebral vein runs posteriorly beneath the third ventricle to meet with the paired basal veins, underneath the corpus collosum. There it forms a shorter trunk; called the great cerebral vein.
Anatomy tidbit- upper extremity/bursae
The tendons and ligaments of the shoulder are cushioned by several fluid filled bursae. Bursae within the the shoulder reduce friction where large muscles and tendons pass across the joint capsule. Two prominent shoulder bursae are: the subscromial-subdeltoid and subscapular bursae. The subacromial-subdeltoid is the main bursae of the shoulder and the largest of the bursae within the body. Begining at the coracoid process, the bursae extends laterally over the superior surface of the supra and infra spinatus tendons, it extends beyond the acromion and continues beneath the deltoid muscle to the greater tubercle of the humerus. This bursae cushions the rotator cuff muscles and coracoacromial arch. The subscapular bursae is located between the subscapularis tendon and the scapula. It communicates with the synovial cavity through an opening in the joint capsule. The bursae protects the subscapularis tendon, where it passes inferiorly to the coracoid process and over the neck of the scapula.
Anatomy tidbit- foot
In addition to the talus and calcaneus; the cuboid, navicular, and the 3 cuneiform bones comprise the remaining 5 tarsal bones of the foot. Lateral and anterior to the calcaneus, is the cuboid bone; which articulates anteriorly with the bases of the 4th and 5th metatarsals. The navicular bone articulates posteriorly with the talus and anteriorly with the cuneiform bones, on the medial side of the foot. The cuneiform bones are numbered from medial to lateral and articulate anteriorly with the first 3 metatarsal bones.



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