Hand Anatomy Thenar
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Hand anatomy thenar. Together the thenar muscles form a fleshy prominence on the lateral radial aspect of the palm called the thenar eminence. Thenar synonyms thenar pronunciation thenar translation english dictionary definition of thenar.
The thenar eminence refers to the group of muscles on the palm of the human hand at the base of the thumb the skin overlying this region is the area stimulated when trying to elicit a palmomental reflex the word thenar comes from greek θέναρ thenar meaning palm of the hand. These include the adductor pollicis palmaris brevis interossei lumbricals thenar and hypothenar muscles.
Origin tubercles of the scaphoid and trapezium. Atlas of human anatomy by netter.
Origin palmar base of third. Insertion base of the proximal phalanx 1 via radial sesamoid bone.
Function thumb abduction moving away from the hand at carpometacarpal joint 1. Hand clin 28 2012 1 7.
Explore and learn the hand muscles with our interactive 3d anatomy atlas. Spaces of the hand.
The disposition of fascia and fascial septa in the hand results in the formation of potential spaces. A hand is a prehensile multi fingered appendage located at the end of the forearm or forelimb of primates such as humans chimpanzees monkeys and lemurs a few other vertebrates such as the koala which has two opposable thumbs on each hand and fingerprints extremely similar to human fingerprints are often described as having hands instead of paws on their front limbs.
Key facts about thenar muscles. Innervation recurrent branch of median nerve c8 t1.
Anatomy and function of the thenar muscles. In this article we shall be looking at the anatomy of the intrinsic muscles of the hand.
Despite their small size they re very important for controlling fine thumb movements such as grabbing and pinching. Following are the important spaces on the palmar aspect.
These spaces are surgically important as they may get infectected and distended with pus. The intrinsic muscles of the hand are located within the hand itself.
The thenar musculature consists of four short muscles located on the lateral radial aspect of the hand hese muscles include the adductor pollicis abductor pollicis brevis flexor pollicis brevis and opponens. They are responsible for the fine motor functions of the hand.
The fleshy mass on the palm of the hand at the base of the thumb. Pulp spaces of the fingers.
