What is the thenar eminence of the hand?
Thenar eminence – fleshy part at the base of the thumb, made up of 3 muscles which control the movements of the thumb.
What causes pain in the thenar eminence?
Thenar eminence pain is usually due to overuse syndrome brought on by repetitive thumb movements. It typically improves with a combination of medical treatments and home remedies. You can sometimes prevent thenar eminence pain by avoiding activities that require repetitive thumb movement.
Why is my thenar eminence swelling?
The muscles within the thenar eminence are connected to the ligament that runs directly over the carpal tunnel, located inside of the wrist. When this ligament becomes stressed or overworked, it can become inflamed and/or the tissue within the carpel tunnel may swell.
What causes wasting of thenar eminence?
This condition is caused by a compression or pinching of the median nerve as it runs through the wrist. Common symptoms include numbness, tingling, and weakness.
What are the 4 thenar muscles?
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.
How do you palpate thenar eminence?
Palpate the thenar eminence from the base of the thumb medial to the central aspect of the hand at the base of the carpal bones, then inferior and lateral to the base of the forefinger (Fig. 8-2). Look for hypertrophy or atrophy in comparison with the opposite hand.
What is the space between thumb and index finger?
The area of skin between the thumb and the index finger is often call the “thenar webspace”. What the “webspace” looks like when a child is performing fine motor tasks is often a good indicator of muscle strength and fine motor control.
Where M palmaris brevis is attached?
Palmaris brevis muscle is a thin, quadrilateral muscle, placed beneath the integument of the ulnar side of the hand….
| Palmaris brevis muscle | |
|---|---|
| Origin | Flexor retinaculum (medial) and palmar aponeurosis |
| Insertion | Palm |
| Artery | Palmar metacarpal artery |
| Nerve | Superficial branch of ulnar nerve |
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 Innervates the hypothenar eminence?
The nerve innervation of the hypothenar eminence is entirely by the ulnar nerve (C8, T1 spinal roots). The ulnar will be travel in the Guyon canal (hook of the hamate and the pisiform). The ulnar nerve will travel superficially to the transverse carpal ligament but under the palmaris brevis muscle.
What is between your fingers called?
Where is the thenar eminence located in the hand?
The thenar eminence is a term given to a muscle group located in the thumb as well as on the palm of the hand. The primary function of the muscle group is to allow for the different types of muscle movements performed by the thumb. The nerve responsible for providing the nerve supply to this area of the body is known as the median nerve.
How does damage to the median nerve affect the thenar eminence?
Damage to the median nerve may inhibit muscle movement in the thenar eminence. Most of the muscles located in the hand receive respective nerve supplies from the ulnar nerve. However, the thenar eminence is supplied by the median nerve. The only other exceptions are the lumbrical muscles, which are responsible for flexing the joints of the fingers.
What causes numbness and tingling in the thenar eminence?
Common symptoms include numbness, tingling, and weakness. Basal thumb arthritis. This condition is due to breakdown of cartilage around the lower thumb joint. While affecting the joints around the thenar eminence and not the muscles themselves, the condition can cause loss of motion or weakness of the thumb.
Where are the thenar muscles located on the little finger?
The hypothenar eminence is a group of three muscles found at the base of the little finger, on the ulnar side of the palm. Similarly to the thenar muscles with the thumb, these muscles control movement in the little finger.