KNES 377 Lecture 9: Ch. 20-21 EWH (Forearm)
6 Nov 2016
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Compound joint: lax capsule, two major ligaments: lateral collateral ligament, medial collateral ligament. Distal humerus: trochlea (ulna), capitulum (head radius, flexion, extension. Humeroulnar joint: modified hinge, trochlea extends further causing valgus carrying angle. Forearm: should have 30-130 degrees of rom for normal adls. Mcl (ulnar: ligament complex, overhead activities, because of the lateral carrying angle, foosha puts valgus force on elbow, putting stress on mcl. Lcl (radial: provides lateral support to elbow against varus stress. Also forearm supinator and shoulder flexor because of its insertions: brachioradialis. Site of ulnar nerve compression; very bony. Radial: goes through radial tunnel, digs down into the supinator and deep into forearm muscles. Median: deep to cubital fossa, medial to bicep tendon. Fingers 2-5: mc and articulating carpal, flexion and extension. Not lots of movement: minimal motion. Finger 1: most mobile: cupping, grasping for various sized objects. Where the trapezium attaches to the first metacarpal. Lots of rom: flexion, extension, abd/add, opposition.
