Layer 4 of palm - Superficial palmar arch layer 


These layers are imaginary, based on dissections of the palm. This layer contains the following

fibrous flexor sheath of index finger 
proper digital artery (from radialis indicis) and nerve (from radial nerve) for the index finger 
3 fibrous tunnel for long flexors 
4 lumbricals 
5 flexor pollicis  brevis 
6 abductor pollicis brevis 
flexor retinaculum (cut) 
8 palmaris longus  
9 tendons of flexor digitorum superficialis 
10 superficial branch of
radial artery (forms part of superficial palmar arch)
11 superficial branch of
ulnar artery (forms part of the superficial palmar arch)
12 abductor digiti minimi 
13 flexor digiti minimi  
proper digital branches of ulnar artery /ulnar nerve  15 common digital branches of median nerve for the thumb 
16 communicating branch of
ulnar nerve 
17 dorsal branch of ulnar nerve/ dorsal carpal branch of  ulnar artery with flexor carpi ulnaris tendon 
18 extensor carpi ulnaris tendon 
anatomical snuffbox 
20 recurrent branch of
proper digital  branch of ulnar artery /proper digital branch of ulnar nerve

Other links

Layer 4:  Superficial palmar arch layer containing

bulletMidpalmar space
bulletFlexor retinaculum
bulletFibrous flexor sheaths
bulletMedian nerve  and branches
bulletSuperficial palmar arch  containing
bulletSuperficial branch of ulnar artery
bulletSuperficial branch of radial artery


DIGITAL LOCATOR OF PALM: Layer 1 Layer of skin of palm. Layer 2 Layer of superficial fascia of palm. Layer 3 Layer of palmar aponeurosis.  Layer 4 Layer of superficial palmar arch. Layer 5 Layer of superficial flexor tendons. Layer 6. Layer of deep flexor tendons. Layer 7 Layer of adductor pollicis. Layer 8 Layer of deep palmar arch. Layer 9 Layer of interossei and joints. Layer 10 Display bones of hand. Roll over to label; click to display, click the blinking end page to open palm page.

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