屈指肌腱肌鞘炎，俗称弹响指，扳机指等，我们知道弹响指，常常发生在掌指关节这一段屈指肌腱，因为肌腱这一段有坚韧的腱鞘将其约束在骨膜上，以防止在屈指运动中，肌腱像弓弦样弹起，或向两侧滑移，因此，腱鞘和骨形成了弹性极小的“骨纤维管”。我们在触诊掌指关节处，常感到这一段腱鞘增厚最明显，我们把它称为环状纤维韧带，肌腱在此缘上长期用力摩擦，可产生腱鞘与肌腱间炎症。
Flexor tendon sheath of finger (Flexor digitorum) inflammation, commonly known as trigger finger or snapping finger, often occurs at the flexor tendons near the metacarpophalangeal (MCP) joint. In this area, the tendon is restrained by a tough tendon sheath that anchors it to the periosteum, preventing the tendon from bowstringing like a bowstring or slipping sideways during finger flexion. Because of this, the tendon sheath and bone form a ‘bone-fibrous canal’ with very little elasticity.
During palpation at the MCP joint, we can often feel a marked thickening of this portion of the tendon sheath, which we refer to as the annular pulley. When the tendon repeatedly rubs against the edge of this pulley under long-term force, inflammation can develop between the tendon sheath and the tendon.
Flexor tendon sheath of finger (Flexor digitorum) inflammation, commonly known as trigger finger or snapping finger, often occurs at the flexor tendons near the metacarpophalangeal (MCP) joint. In this area, the tendon is restrained by a tough tendon sheath that anchors it to the periosteum, preventing the tendon from bowstringing like a bowstring or slipping sideways during finger flexion. Because of this, the tendon sheath and bone form a ‘bone-fibrous canal’ with very little elasticity.
During palpation at the MCP joint, we can often feel a marked thickening of this portion of the tendon sheath, which we refer to as the annular pulley. When the tendon repeatedly rubs against the edge of this pulley under long-term force, inflammation can develop between the tendon sheath and the tendon.