Distal insertions of abductor pollicis longus muscle and arthritis of the first carpometacarpal joint in 104 dissections

Effects of the Deep Anterior Oblique and Dorsoradial Ligaments on Trapeziometacarpal Joint Stability

“…Accessory insertions of the APL are common, with at least 1 supernumerary slip occurring in around 95% of the population, and multiple accessory insertions occur in a somewhat smaller percentage. 22,23 These accessory slips were not modified in any way during the dissection of specimens in this study because they have not been found to have any correlation to the presence or severity of basilar osteoarthritis. 22,23 To simulate thumb opposition, we assumed activity in the OPP and APB as reported by Roach et al 19 Anatomic observation in cadavers indicates that the FPL is certainly a principally active muscle as well; without distal flexion of the thumb, opposition motion with tip pinch is impossible.…”

Anatomic Variations of the First Extensor Compartment and Abductor Pollicis Longus Tendon in Trapeziometacarpal Arthritis

“…The different slips of the APL tendon can be grouped into a superficial and a deep group, inserting on the thumb MC or trapezium and thenar structures, respectively [11]. There is no connection between the fibers of the Lacey et al [13] 7/38 (18%) 19/38 (50%) 10/38 (26%) 2/38 (5%) Jackson et al [9] 83/300 (28%) 181/300 (60%) 29/300 (10%) 6/300 (2%) 1/300 (0.3%) Roush et al [20] 2/61 (3%) 12/61 (20%) 41/61 (67%) 6/61 (10%) Schulz et al [21] 3 [20] 61/61 (100%) 55/61 (90%) 48/61 (79%) Schulz et al [21] 73/73 (100%) 24/73 (33%) 31/73 (43%) Bouchlis et al [3] 104/104 (100%) 70/104 (70%) 43/104 (42%) Brunelli and Brunelli [5] 100/100 (100%) 71/100 (71%) 75/100 (75%) Roh et al [19] 68/68 (100%) 35/68 (51%) Zancolli [30] 43 superficial and deep divisions and a large bursa between the two groups of tendons can be found [11,25] suggesting separate functioning of the various divisions [11]. Van Oudenaarde [25] suggested that the deep division of the APL is important to support the trapezium as a platform upon which the thumb MC is extended by the superficial division of the APL.…”

Robusticity and osteoarthritis at the trapeziometacarpal joint in a Bronze Age population from Tell Abraq, United Arab Emirates

“…The abductor pollicis longus muscle attaches at the base of the first metacarpal bone and acts to radially abduct and extend the thumb at the TMC joint in a frontal plane (Bouchlis et al, 1997). The deep head of the flexor pollicis brevis, also attaching to the base of the first metacarpal, acts to flex the thumb at the TMC joint (Abrahams et al, 1998;Moore and Dalley, 1999;Simons et al, 1999).…”

“…There is no single cause for OA, but a number of factors that seem to correlate highly with its existence include age, systemic issues, acute trauma, weight, genetic predisposition, and mechanical stress (Zimmerman and Kelley, 1982;Steele and Bramblett, 1988;Brandt, 1996;Larsen, 1997;Blackburn, 1999;Jurmain, 1999;Cox and Mays, 2000;Hannan, 2001). Osteoarthritis often first affects the large weight-bearing joints of the body but also the interphalangeal joints in the fingers (Plato and Norris, 1979) and the trapeziometacarpal (TMC) joint of the thumb (Brandt, 1996;Bouchlis, 1997;Blackburn, 1999;Jurmain, 1999;Lozada and Altman, 2001).…”

“…1) (Swanson et al, 1995). Gripping and pinching tasks produce torques that increase contact stress and can lead to deterioration of articular cartilage (Bouchlis et al, 1997;Xu et al, 1998, Jurmain , 1999Momose et al, 1999). The trapezium is more often affected with OA than the first metacarpal bone (Swanson, 1972).…”