How many palmar interossei are there

The adductor pollicis crosses anterior to both the heads of the first and second palmar interossei. The flexor tendons of flexor digitorum superficialis and profundus similarly overlap the third and fourth palmar interossei.

Palmar interossei are largely supplied by branches from the deep palmar arch, princeps pollicis and palmar metacarpal arteries. The patient lies their palm flat on a table and tries to hold a piece of paper in between their second and third digits. The examiner attempts to pull that piece of paper away to assess the strength of adduction and ensure the ulnar nerve is intact. Please Note: You can also scroll through stacks with your mouse wheel or the keyboard arrow keys.

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Reference article, Radiopaedia. URL of Article. On this page:. Gray's Anatomy for Students. Cleveland : Churchill Livingstone , Grab the pull-up bar and hang for one minute at a time if possible. Repeat this exercise three times a day. If not challenging enough, try to hang with only the fingertips. Assume the push-up position with the hands under the shoulders lifting the body off the ground and the legs in line with the body, on the toes.

If on the toes is too hard, assume the position on the knees, making sure the body is aligned properly. Lift the palms off the floor until the fingertips are supporting the body. Lower the body toward the floor and push-up to resume the starting position. Perform twelve repetitions for three sets. Complete this exercise three times a week.

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We'd like to set Google Analytics cookies to help us to improve our website by collecting and reporting information on how you use it. The cookies collect information in a way that does not directly identify anyone. For more information on how these cookies work, please see our 'Cookies page'. Literal meaning The muscle between the bones on the flat of the hand. Interesting information Palmar interossei are the skeletal muscles of the hand that are responsible for movement of the fingers.

Origin Sides of metacarpals facing midline. Insertion Bases of proximal phalanges. Extensor expansions. Function Adduction of fingers. Flexion of fingers. Extension of fingers. Nerve supply Deep branch of the ulnar nerve.