BIOL 030 Lecture Notes - Lecture 21: Carpal Tunnel, Ulnar Nerve, Radial Artery

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Be able to identify them in bone specimens as well as on x-rays. What are the typical effects ini the hand of a lower brachial plexus. Carpal bones some lovers try positions that they cannot handle . Proximal - scaphoid (skiff boat), lunate, triquetrum (3 sides), Distal trapezium, trapezoid, capitate (little head), hamate (hook) Phalanges proximal, middle and distal (though thumb only has proximal and distal) Note radius is big at the wrist. Scaphoid bone is the most common wrist bone to be fractured if you catch fall with hands. Blood comes into scaphoid at its distal end and so if fracture happens below that circulation may be compromised and nonunion or avascular necrosis could develop. Wrist remember that the palm is face up in anatomical position. Fingers think of the middle finger as the midline. Abduction (away from middle finger)/adduction (toward middle finger) Extension/flexion tricky, main flexion action of thumb . Abduction (move thumb anterior to 4 fingers)/adduction.

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