ANATOMY LECTURE 6 - ELBOW JOINT/FOREARM
Last Modified: 2011-07-21
1. HINGE TYPE OF SYNOVIAL JOINT
2. PERMITS ONLY FLEXION + EXTENSION
A. HUMERO-ULNAR ARTICULATION:
B. HUMERO-RADIAL ARTICULATION:
Carrying Angle (like carrying a couple of buckets):
SUBCUTANEOUS OLECRENON BURSAE: aka "student's elbow"
Attached to the ulna at the anterior and posterior margins of the radial notch – good attach but can have partial dislocation- common in young children – see following slides
FLOOR = FORMED BY BRACHIALIS + SUPINATOR MUSCLES
ROOF = FORMED BY CONTINUITY OF BRACHIAL/ANTEBRACHIAL(DEEP) FASCIA + REINFORCED BY BICIPITAL APONEUROSIS + SUBCUTANEOUS TISSUE + SKIN
A. radius (lateral)
B. ulna (medial)
2. ulnar nerve
3. radial nerve
2. innervated mainly by branches of the median nerve (1.5 muscles innervated by ulnar nerve branches)
3. superficial (first), intermediate (second),deep (third) layers
1. Lateral part (to digits 2 and 3) innervated by anterior interosseous branch of median nerve (C8, T1)
2. Medial part (to digits 4 and 5) innervated by ulnar nerve (C8, T1)
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