Table of Contents
Where are the thenar muscles located?
The thenar musculature consists of four short muscles located on the lateral (radial) aspect of the hand. These muscles include the adductor pollicis, abductor pollicis brevis, flexor pollicis brevis and opponens pollicis.
What muscles make up the thenar group?
The four thenar muscles make up the intrinsic muscles of the thumb. They include the abductor pollicis, adductor pollicis, opponens pollicis, and flexor pollicis brevis. Thumb motion is facilitated through the coordination of these intrinsic muscles.
Where are the thenar and hypothenar eminences found?
The thenar eminence is the fleshy mound at the base of the thumb. The hypothenar eminence is the mound located at the base of the fifth digit (little finger). The eminences at either side of the hand are made up of muscles. The muscles located in the thenar eminence function primarily to control the thumb.
What is a thenar?
Definition of thenar : of, relating to, involving, or constituting the ball of the thumb or the intrinsic musculature of the thumb.
Where is the thenar crease located?
The thenar crease usually intersects the lateral side of the proximal palmar crease and curves obliquely across the palm to intersect the distal wrist crease near the wrist centre. The mean length of thenar crease was 7.37 cm (range 5–10.7 cm).
What are the 3 thenar muscles?
The three muscles are: opponens pollicis muscle. flexor pollicis brevis muscle. abductor pollicis brevis muscle.
What is thenar space?
The thenar space is one of the three deep palmar spaces. It is rarely the site of hand infections. The fibrofatty space contains the first lumbrical muscle. Relations: ulnarly: midpalmar septum from border of palmar aponeurosis to palmar border of third metacarpal bone.
What is thenar muscle wasting?
Atrophy or wasting of the thumb (thenar) muscles is the last stage of nerve injury in carpal tunnel syndrome. Hand muscles bulge underneath the skin of your hand. The most obvious one is on the palm side of the thumb at the thumb base. These are the thenar muscles.
What is the thenar crease?
What muscles make up the thenar musculature?
The thenar musculature consists of four short muscles located on the lateral (radial) aspect of the hand . These muscles include the adductor pollicis , abductor pollicis brevis , flexor pollicis brevis and opponens pollicis .
What are the thenar muscles of the palm?
These muscles include the adductor pollicis , abductor pollicis brevis , flexor pollicis brevis and opponens pollicis . Together, the thenar muscles form a fleshy prominence on the lateral (radial) aspect of the palm called the thenar eminence. These muscles originate from different carpal bones and distally attach to the thumb.
What is the thenar eminence responsible for?
The muscle bellies produce a bulge, known as the thenar eminence. They are responsible for the fine movements of the thumb. The median nerve innervates all the thenar muscles. The opponens pollicis is the largest of the thenar muscles, and lies underneath the other two.
What muscles attach to the opponens pollicis?
The opponens pollicis is the largest of the thenar muscles, and lies underneath the other two. Attachments: Originates from the tubercle of the trapezium, and the associated flexor retinaculum.