the finger movements necessary to produce the \"Vulcan salute\" can only be made

Question

the finger movements necessary to produce the "Vulcan salute" can only be made correctly with practice.

Examine the neuromuscular interactions that are responsible for this situation. How do the nerves, muscles, bones, and joints interact in making this hand sign in a way that is different from the unmodified (or unpracticed) movements of these structures in the hand? What has to be modified for a successful Vulcan salute?

Be sure to identify the muscles that contribute to these actions and the nerves that supply them, and to describe how the interactions of the nerves with the muscles, bones, and joints accomplish this phenomenon.

Explanation / Answer

Vulcan salute is a hand gesture. It involves holding the palm of one hand outwards while placing the fingers in V shape by seperating middle finger and ring finger and keping others together along with the thumb extended.

The human hand is made up of 27 individual bones, 8 carpals, 5 metacarpal, 14 finger bones (phalanges) connected by joints and ligaments.

The joints connecting the metacarpals and fingers (phalanges) are metacarpophalangeal joints while those connecting the phalanges are interphalangeal joints. These joints are involved while performing a vulcan salute.

Radial nerve and ulnar nerves are responsible for this gesture. Radial nerve (nervus radiatus) controls muscles of the fingers and wrist . While performing a vulcan salute the radial nerve control the muscles of the fingers to be extended.Ulnar nerve controls the muscles betwen the bones of the metacarpus so that the ring finger and middle finger are seperated.

Seven muscles Abductor digiti minimi brevis, Flexor digiti minimi brevis, Adductor pollices, Flexor pollicis brevis, Abductor pollicis brevis, Opponens pollicis, Opponens digiti minimi are responsible for the abduction (inward movement ) and adduction (outward) of the fingers.

Extensor pollicis longus controls the extension of the thumb.

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