Facts about Pisiform
- 09
Repetitive gripping activities can cause pisotriquetral joint inflammation, a condition called pisotriquetral arthritis that accounts for approximately 0.5 to 3 percent of all chronic wrist pain cases.
- 08
Compression of the ulnar nerve as it passes posterior to the pisiform can cause Guyon's canal syndrome, a condition affecting motor control of the intrinsic hand muscles.
- 07
Pisiform bone articulation with the triquetrum allows for a sliding motion that contributes approximately 10 to 15 degrees of ulnar deviation during wrist flexion and extension movements.
- 06
Pisiform fractures account for approximately 0.3 percent of all carpal bone injuries, yet they frequently go undiagnosed because standard wrist X-rays often fail to visualize this small sesamoid bone adequately.
- 05
Palpating the pisiform bone requires applying pressure to the ulnar side of the wrist crease, where clinicians locate it to assess for tenderness in pisotriquetral arthritis and other wrist pathologies.
- 04
At approximately 8 millimeters in diameter, the pisiform is the smallest carpal bone in the human wrist and serves primarily as a sesamoid bone within the flexor carpi ulnaris tendon.
- 03
Muscular attachments to the pisiform include the flexor carpi ulnaris and abductor digiti minimi, making it a crucial anchor point for pinky finger and wrist movement.
- 02
The pisiform articulates exclusively with the triquetrum bone, making it unique among carpals for having only a single carpal joint partner.
- 01
Located on the pinky side of the wrist, the pisiform bone is the only carpal bone that develops from a separate ossification center around age 12.