36 THE POCKET ANATOMY 



Posterior annular ligament (v. p. 13) is the thickened lower 

 part of the posterior part of the deep fascia. 



Pronotor radii teres : Humeral head. Internal supra-condylar 

 ridge of humerus, internal condyle of humerus by common 

 flexor tendon. Ulnar head. Inner border of coronoid process 

 of ulna, fascia and septum (F) rough impression about middle 

 of outer surface of radius(x) (Median) .7 [Flexes elbow and 

 pronates forearm.] Median nerve enters forearm between the two 

 heads of origin. 



Flexor carpi radialis : common flexor tendon from internal 

 condyle of humerus(T), aponeurosis of forearm, intermuscular 

 septa(p) bases of palmar aspect of 2nd and 3rd metacarpal 

 bones(x) (Median)*,? [Flexes elbow and wrist, abducts hand.] 

 External edge of muscle, guide to radial artery. Passes through 

 groove in trapezium, and has special sheath externally under annular 

 ligament. 



Palmaris longus : common flexor tendon from internal con- 

 dyle of humerus(x), aponeurosis of forearm(F), intermuscular 

 septa(F) Palmar fascia, and a slip to short muscles of thumb 

 (T) (Median).? [Flexes wrist, makes tense palmar fascia.] 

 Passes over annular ligament. 



Flexor carpi ulnaris : Humeral head. Common flexor tendon, 

 from internal condyle of humerus(T). Ulnar head. Inner side 

 of olecranon, upper f of posterior border of ulna(A) Pisiform 

 bone and prolonged to base of 5th metacarpal and hook of 

 Cuneiform bone(x) (Ulnar)j8,J [Flexes elbow and wrist, adducts 

 hand.] Radial side of muscle, guide to ulnar artery. Ulnar nerve 

 enters forearm between two heads of origin. 



Flexor sublimis digitorum, vel perforatus : Humeral head. 

 Common flexor tendon from internal condyle of humerus(x), 

 internal lateral ligament(F), intermus^ula^sejjtaCFV Ulnar 

 head. Inner border of coronoid processoiulna. ' Radial head. 

 Oblique line of radius below tubercle, and part of anterior 

 border(A) sides of middle phalanges of ringers, tendon being 

 split for flexor profundus digitorum(x) ( Median ).^| ; /[Flexes 

 elbow, wrist, carpal, metacarpal, and ist interphalangeal 

 joints.] Tendons pass under annular ligament, in pairs, those of 

 middle and ring-finger being anterior to those of index and little 

 fingers. 



(b) Deep Layer. 



Flexor profundus digitorum, w/perforans : upperf of anterior 

 and internal surfaces of shaft of ulna, upper f of ulnar half of 

 interosseous membrane, aponeurosis from posterior border of 

 ulna(p) palmar surfaces of bases of last phalanges(xj. (Inner 



