Murakami Y, Edashige K
Hand. 1980 Feb;12(1):82-4. doi: 10.1016/s0072-968x(80)80035-0.
This paper presents a case in which an anomalous tendon from the flexor pollicis longus to the flexor indicis profundus caused limitation of independent flexion of the thumb. The anomaly was accompanied by chronic tenosynovitis.