Fact · Accessibility and health
The A1 pulley, at the base of each finger in the palm, is the pulley most involved in trigger finger.
Checked against its source on October 16, 2026
In the source's own words
“The A1 pulley sits in your palm at the base of each finger; it is the pulley most involved in trigger finger.”
Trigger Finger (stenosing tenosynovitis), American Academy of Orthopaedic Surgeons, OrthoInfo, n.d., Anatomy.
Open the original- What it measures
- The guide compares the pulleys to the guides on a fishing rod that keep the tendons close to the bone.
- What it does not show
- Anatomy and mechanism. It does not give treatment outcomes.