Where are the Hypothenar and thenar compartments?
Where are the Hypothenar and thenar compartments?
Thenar eminence – fleshy part at the base of the thumb, made up of 3 muscles which control the movements of the thumb. Hypothenar eminence – fleshy part at the base of the fifth digit (little finger), made of 4 muscles which contract to manifest motion through the little finger.
What is the thenar area?
Your thenar eminence is the soft fleshy area at the base of your thumb. The four muscles found here make your thumb opposable. That is, they allow your thumb to grip and hold small objects like a pencil, sewing needle, or spoon.
Where is thenar located?
The thenar muscles are three short muscles located at the base of the thumb. 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.
What are the three thenar muscles?
The following three muscles are considered part of the thenar eminence:
- Abductor pollicis brevis abducts the thumb.
- Flexor pollicis brevis, which lies next to the abductor, will flex the thumb, curling it up in the palm.
- Opponens pollicis lies deep to abductor pollicis brevis.
Is Opponens Pollicis a hypothenar muscle?
The intrinsic muscles of hand can be remembered using the mnemonic, “A OF A OF A” for, Abductor pollicis brevis, Opponens pollicis, Flexor pollicis brevis (the three thenar muscles), Adductor pollicis, and the three hypothenar muscles, Opponens digiti minimi, Flexor digiti minimi brevis, Abductor digiti minimi.
What is thenar and Hypothenar?
The word “thenar” means fleshy mounds. 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.
What is hypothenar?
Hypothenar refers to the group of muscles that control the movement of the little finger. Some of these muscles make up the fleshy edge of the palm (hypothenar eminence).
What is thenar and hypothenar?
What are the boundaries of hypothenar space?
radially: ulnar border of hypothenar muscles. distally: distal margin of hypothenar muscles. proximally: flexor retinaculum. volarly: hypothenar fascia.
What is Hypothenar eminence?
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 the difference between thenar eminence and hypothenar?
Thenar eminence – fleshy part at the base of the thumb, made up of 3 muscles which control the movements of the thumb. Hypothenar eminence – fleshy part at the base of the fifth digit (little finger), made of 4 muscles which contract to manifest motion through the little finger.
What muscles make up the thenar and hypothenar muscles?
The largest of the thenar muscles, opponens pollicis, along with hypothenar muscle, opponens digiti minimi, leads to opposition between little finger and thumb. Palmaris brevis permits the wrinkling of the skin on the palmar surface of the hand.
What are the hypothenar muscles of the hand?
From superficial to deep, the hypothenar muscles are: palmaris brevis, abductor digiti minimi, flexor digiti minimi, and opponens digiti minimi muscles. The hypothenar muscles are intrinsic muscles of the hand located within the medial side of the palm.
What is thenar muscle atrophy in carpal tunnel?
Thenar Muscle Atrophy. In advanced carpal tunnel syndrome, the patient may suffer from thenar muscle atrophy due to loss of nerve supply and disuse. The median nerve is the sole nerve supply of the thenar muscles. This nerve supplies finger sensation and muscle function to the thumb, index finger, middle finger, and half of the ring finger.
