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The fingers do not have muscles, but they are still able to move. This is because the muscles responsible for finger movement are located in the forearm. These muscles end up as tendons in the hand, which help us to move our fingers.
| Characteristics | Values |
|---|---|
| Muscles in fingers | No |
| Muscles controlling fingers | Located in palms and arms |
| Muscles in hand | Intrinsic and extrinsic muscle groups |
| Intrinsic muscle groups | Thenar (thumb), hypothenar (little finger), interossei, lumbrical, palmaris brevis, adductor pollicis |
| Extrinsic muscle groups | Long flexors and extensors |
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What You'll Learn
- There are no muscles in the fingers, but there are in the palm
- The muscles in the palm control the function of the fingers
- The fingers have two long flexors, located on the underside of the forearm
- The muscles of the hand can be subdivided into two groups: the extrinsic and intrinsic muscle groups
- The intrinsic muscle groups are the thenar (thumb) and hypothenar (little finger) muscles
There are no muscles in the fingers, but there are in the palm
The muscles of the hand can be subdivided into two groups: the extrinsic and intrinsic muscle groups. The extrinsic muscle groups are the long flexors and extensors. They are called extrinsic because the muscle belly is located on the forearm. The intrinsic group are the smaller muscles located within the hand itself. The intrinsic muscle groups are the thenar (thumb) and hypothenar (little finger) muscles; the interossei muscles (four dorsally and three volarly) originating between the metacarpal bones; and the lumbrical muscles arising from the deep flexor.
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The muscles in the palm control the function of the fingers
There are no muscles in the fingers, but there are in the palm. The muscles in the palm control the function of the fingers. The fingers have two long flexors, located on the underside of the forearm, which insert by tendons to the phalanges of the fingers. The muscles of the hand can be subdivided into two groups: the extrinsic and intrinsic muscle groups. The extrinsic muscle groups are the long flexors and extensors. They are called extrinsic because the muscle belly is located on the forearm. The intrinsic group are the smaller muscles located within the hand itself. The intrinsic muscle groups are the thenar (thumb) and hypothenar (little finger) muscles; the interossei muscles (four dorsally and three volarly) originating between the metacarpal bones; and the lumbrical muscles arising from the deep flexor (and which are special because they have no bony origin) to insert on the dorsal extensor hood mechanism.
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The fingers have two long flexors, located on the underside of the forearm
The fingers do not have muscles. Their function is controlled by muscles in the palms and arms. The muscles of the hand can be subdivided into two groups: the extrinsic and intrinsic muscle groups. The extrinsic muscle groups are the long flexors and extensors. They are called extrinsic because the muscle belly is located on the forearm. The fingers have two long flexors, located on the underside of the forearm. They insert by tendons to the phalanges of the fingers. The deep flexor attaches to the distal phalanx, and the superficial flexor attaches to the middle phalanx. The flexors allow for the actual bending of the fingers.
The intrinsic muscle groups are the thenar (thumb) and hypothenar (little finger) muscles; the interossei muscles (four dorsally and three volarly) originating between the metacarpal bones; and the lumbrical muscles arising from the deep flexor (and which are special because they have no bony origin) to insert on the dorsal extensor hood mechanism. The intrinsic group are the smaller muscles located within the hand itself. The muscles of the hand are innervated by the radial, median, and ulnar nerves from the brachial plexus.
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The muscles of the hand can be subdivided into two groups: the extrinsic and intrinsic muscle groups
The intrinsic muscle groups are the thenar (thumb) and hypothenar (little finger) muscles; the interossei muscles (four dorsally and three volarly) originating between the metacarpal bones; and the lumbrical muscles arising from the deep flexor (and which are special because they have no bony origin) to insert on the dorsal extensor hood mechanism. Palmaris brevis, which is a superficial muscle, and adductor pollicis are also intrinsic muscles. The fingers have two long flexors, located on the underside of the forearm. They insert by tendons to the phalanges of the fingers. The deep flexor attaches to the distal phalanx, and the superficial flexor attaches to the middle phalanx.
The extrinsic muscles of the hand can be further divided into superficial, intermediate, and deep groups. The majority of the muscles in the group are flexor muscles. The superficial group includes the flexor carpi radialis, palmaris longus, and flexor carpi ulnaris. The flexor carpi ulnaris is innervated by the ulnar nerve while both the flexor carpi radialis and palmaris longus are innervated by the median nerve. Each of these muscles allows for the flexion of the wrist.
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The intrinsic muscle groups are the thenar (thumb) and hypothenar (little finger) muscles
While there are no muscles in the fingers themselves, the fingers are controlled by muscles in the palms and arms. The intrinsic muscle groups are the thenar (thumb) and hypothenar (little finger) muscles. These are the smaller muscles located within the hand itself. The thenar and hypothenar muscles are two of the thumb muscles. The intrinsic muscle groups also include the interossei muscles (four dorsally and three volarly) originating between the metacarpal bones, and the lumbrical muscles arising from the deep flexor. The fingers have two long flexors, located on the underside of the forearm. They insert by tendons to the phalanges of the fingers. The deep flexor attaches to the distal phalanx, and the superficial flexor attaches to the middle phalanx. The extrinsic muscle groups are the long flexors and extensors. They are called extrinsic because the muscle belly is located on the forearm.
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Frequently asked questions
No, there are no muscles in the fingers.
The function of the fingers is controlled by muscles in the palms and arms.
Yes, there are muscles in the palm.
The muscles in the palm are called the thenar (thumb) and hypothenar (little finger) muscles.
Yes, the fingers have two long flexors, located on the underside of the forearm, which insert by tendons to the phalanges of the fingers.
