Table 2.

The anatomical structure evaluated.

Middle finger		Thumb
Metacarpo-phalangeal joint	Lumbrical muscle/interosseous muscle	Metacarpo-phalangeal joint	Abductor pollicis brevis
	Sagital band		Flexor pollicis brevis
	A1 pulley		Adductor pollicis muscle
	Articular capsule		Extensor pollicis brevis
	Medial collateral ligament		Sagital band
	Lateral collateral ligament		Medial collateral ligament
	Volar plate		Lateral collateral ligament
Proximal phalanx	A2 pulley		Volar plate
Proximal interphalangeal joint	Transverse retinacular band		Articular capsule
	C1 pulley	Interphalangeal joint	Extensor pollicis longus
	Articular capsule		Flexor pollicis longus
	Medial collateral ligament		Medial collateral ligament
	Lateral collateral ligament		Lateral collateral ligament
	Volar plate		Articular capsule
Middle phalanx	Insertion of central slip		Volar plate
	Insertion of flexor digitorum superficialis
	A4 pulley
Distal interphalangeal joint	Insertion of conjoined tendon
	Incertion of flexor digitorum profundus
	Articular capsule
	Medial collateral ligament
	Lateral collateral ligament
	Volar plate