[United]

Hi all,

what muscle(s) is(are) responsible for holding a glass of water?


If you have an online source please share the link for future reference.
Thanx.

 

[Haisook]

Wow.. interesting question. Here are my 2 cents:

I think in order to hold a glass of water, the following muscles will act:

• Arm: mild flexion by biceps brachii.
• Forearm: mid-supination by biceps brachii and supinator & flexion of the fingers by muscles of the anterior comparment of the forearm; flexor carpi radialis, flexor carpi ulnaris, flexor digitorum superficialis, flexor digitorum profundus, flexor pollicis longus.
• Hand:
  • Thumb: opposition (flexion of the thumb at the first carpometacarpal joint) by opponens pollicis & flexion of the first metacarpophalangeal joint by flexor pollicis brevis.
  • Little finger: opposition by opponens digiti minimi & flexion by flexor digiti minimi.

This may not be totally accurate, but I guess it's pretty close.