Thumb Muscle Anatomy
The first dorsal interosseus also serves the thumb. The abductor pollicis brevis the flexor pollicis brevis and the opponens pollicis.
The muscles of the thumb all contain the word pollicis and are distinguished by extensor flexor oppenens and abductor designations.
Thumb muscle anatomy. The thumb shares the following with each of the other four fingers. The thenar muscle group is found at the base of the thumb forming the muscle bulk on the thumb side of the hand. Having a dorsal surface that features hair and a nail and a hairless palmar aspect with fingerprint ridges.
This includes longus and brevis descriptions. The thenar eminence is a group of three small muscles at the base of the thumb. The extrinsic hand muscles with their muscle bellies located in the forearm and the intrinsic hand muscles with their muscles bellies located in the hand proper.
Despite their small size theyre very important for controlling fine thumb movements such as grabbing and pinching. The muscles of the thumb are nine skeletal muscles located in the hand and forearm. The muscles acting on the thumb can be divided into two groups.
It is comprised of three muscles. The thumb generally receives oxygenated blood by the princeps pollicis artery. It connects the muscle in the back of the forearm to the bone in the middle of the thumb.
Having a skeleton of phalanges joined by hinge like joints that provide flexion toward the palm of the hand. The muscles allow for flexion extension adduction abduction and opposition of the thumb. This tendon also travels along the back of the thumb and helps straighten the thumb but it connects the muscle in the back of the forearm to the bone at the tip of the thumb.
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