Trapezium bone

Authors

Affiliations

Nate Yomogida, B.S., SPT

Doctor of Physical Therapy

B.S. in Kinesiology

Chloë Kerstein, B.S., SPT

Doctor of Physical Therapy

B.A. in Neuroscience

Figure 1: Bones of the left hand (Anterior surface)¹

Figure 2: Bones of the left hand (posterior surface)¹

Figure 3: Trapezium bone (left)¹

Muscular attachments

Table 1: Muscles inserting on the Trapezium

Muscle	Origin	Insertion	Innervation	Action

Table 2: Muscles originating from the Trapezium

Muscle	Origin	Insertion	Innervation	Action
Abductor digiti minimi (hand)	hand_flexor_retinaculum	Base of 1st proximal phalanx (radial sesamoid)	Median n. C8 - T1	CMC: Abduction
Abductor pollicis brevis	Scaphoid Trapezium Flexor retinaculum	1st proximal phalanx via radial sesamoid	Median n. C8 - T1	CMC: Abduction
Flexor pollicis brevis	Flexor retinaculum Capitate Trapezium	1st proximal phalanx via radial sesamoid	Median n. Ulnar n. C8 - T1	CMC: Flexion
Opponens pollicis	Trapezium	1st metacarpal (radial border)	Median n. C8 - T1	CMC: Opposition

References

1.

Gray H. Anatomy of the Human Body. 20th ed. (Lewis WH, ed.). Lea & Febiger; 1918. https://www.bartleby.com/107/