Lateral view of the extensor indicis muscle with bony attachments.

Lateral view of the flexor pollicis longus muscle with bony attachments.

Posterior view of the flexor pollicis longus muscle with bony attachments.

Lateral view of the extensor pollicis brevis muscle with bony attachments.

Lateral view of the extensor carpi radialis brevis muscle with bony attachments.

Anterior view of the flexor pollicis longus muscle with bony attachments.

Posterior view of the extensor digiti minimi muscle with bony attachments.

Anterior view of the extensor carpi ulnaris muscle with bony attachments.

Hip of child shown with gluteus illustrated. Hand of nurse places thumb on anterosuperior iliac crest and spreads fingers. Preferred site of injection is indicated between index finger and thumb as a + within a circle.

Anterior view of the extensor pollicis brevis muscle with bony attachments. Bones are illustrated slightly transparent to show muscle behind.

Anterior view of the flexor digitorum profundus muscle with bony attachments.

Anterior view of the extensor pollicis longus muscle with bony attachments. Bones and ligament are illustrated slightly transparent to show muscle behind.

Thumb muscles