Dominic Stone
Opponens Digiti Minimi (ODM) is an intrinsic muscle of the hand. It is a small, triangular muscle that extends between the hamate bone (carpal bone) and the fifth metacarpal bone. ODM is part of the hypothenar muscle group, which includes the abductor digiti minimi and flexor digiti minimi brevis muscles. These muscles work together to move the little finger and provide fine motor movement of the hand, such as when gripping a ball.
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What You'll Learn
- Opponens digit minimi (ODM) is an intrinsic muscle of the hand
- ODM is a triangular muscle that extends between the hamate bone and the 5th metacarpal bone
- The hypothenar muscle group is formed by ODM, abductor digiti minimi, and flexor digiti minimi brevis
- The ulnar nerve supplies hypothenar muscles, including ODM
- ODM acts on the fifth carpometacarpal joint to cause finger flexion and lateral rotation
Opponens digit minimi (ODM) is an intrinsic muscle of the hand
The opponens digit minimi muscle is responsible for flexion, lateral rotation, and opposition of the little finger. This movement of the little finger is important for a strong hand grip and is used in various sports such as baseball and rugby. The muscle helps to deepen the hollow of the palm, allowing for a more secure grip on curved or irregular objects.
The blood supply to the opponens digit minimi muscle is provided by the deep palmar branch of the ulnar artery and the deep palmar arch, which is a terminal branch of the radial artery. The deep branch of the ulnar nerve, which stems from the brachial plexus, innervates this muscle. The ulnar nerve passes through the hook of hamate and pisiform bone, also known as Guyon's canal. Any compromise to the nerve at this point can lead to atrophy of the ODM and weakness in moving the little finger.
Understanding the anatomy and function of the intrinsic hand muscles is crucial for diagnosing and treating hand injuries and conditions. The loss of hypothenar muscles, including the opponens digit minimi, can result in palmar atrophy and weakness in the movement of the little finger. Physiotherapists and medical professionals can assess muscle function and identify any abnormalities through physical examinations and patient interviews.
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ODM is a triangular muscle that extends between the hamate bone and the 5th metacarpal bone
The opponens digiti minimi (ODM) is an intrinsic muscle of the hand. It is a small, triangular muscle that extends between the hamate bone (a carpal bone) and the fifth metacarpal bone. The hamate bone is the convex part of the hook of hamate bone. The opponens digiti minimi is part of the hypothenar muscle group, which also includes the abductor digiti minimi and flexor digiti minimi brevis muscles. These muscles are located in the hypothenar compartment of the hand, on the ulnar side of the palm, between the wrist and the base of the little finger.
The opponens digiti minimi is responsible for flexion, lateral rotation, and opposition of the little finger. This movement is important for a strong hand grip, especially when gripping curved or irregular objects such as a ball. The muscle is supplied by the deep palmar branch of the ulnar artery and the deep palmar arch, which is the terminal branch of the radial artery.
The ulnar nerve supplies the hypothenar muscles, including the opponens digiti minimi, and passes through the hook of hamate and pisiform bone (Guyon's canal). Compromise to the nerve at this point can lead to atrophy of the ODM and weakness in moving the little finger. There may also be numbness, tingling, and pain in the fourth and fifth fingers.
The opponens digiti minimi is closely related to two neurovascular structures. The deep palmar branch of the ulnar artery courses directly through the opponens digiti minimi, before anastomosing with the radial artery. The perforating branch of the ulnar artery and the deep branch of the ulnar nerve divide the opponens digiti minimi into two lamellae, or bands.
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The hypothenar muscle group is formed by ODM, abductor digiti minimi, and flexor digiti minimi brevis
The human body has more than 600 muscles, which help us move, breathe, and stay alive. These muscles are made of thousands of small fibres woven together. Skeletal muscles, for example, work with bones, tendons, and ligaments to support our weight and move us.
The opponens digiti minimi (ODM) is an intrinsic muscle of the hand. It is a small, triangular muscle that extends between the hamate bone (a carpal bone) and the fifth metacarpal bone. The opponens digiti minimi is part of the hypothenar muscle group, which also includes the abductor digiti minimi and flexor digiti minimi brevis muscles. All three muscles are located in the hypothenar compartment of the hand, on the ulnar side of the palm, between the wrist and the base of the fifth digit (the little finger).
The hypothenar muscles act together to move the little finger. The opponens digiti minimi is responsible for flexion, lateral rotation, and opposition of the little finger. This is important for a strong hand grip, which is used in various sports, such as baseball and rugby. The ulnar nerve supplies the hypothenar muscles, including the opponens digiti minimi, and passes through the hook of hamate and pisiform bone (Guyon's canal).
The opponens digiti minimi is closely related to two neurovascular structures. The deep palmar branch of the ulnar artery courses directly through the opponens digiti minimi, before anastomosing with the radial artery. The deep branch of the ulnar nerve divides the opponens digiti minimi into two lamellae, or bands.
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The ulnar nerve supplies hypothenar muscles, including ODM
The human body is made up of more than 600 muscles, which help us move our bodies and keep us alive. Skeletal muscles, for example, work with bones, tendons, and ligaments to support our weight and move us. These muscles are voluntary, meaning that they move when we think about moving a part of our body.
The opponens digiti minimi (ODM) is an intrinsic muscle of the hand. It is a triangular muscle that extends between the hamate bone (carpal bone) and the fifth metacarpal bone. ODM forms the hypothenar muscle group, which includes the abductor digiti minimi and flexor digiti minimi brevis. These muscles are located on the medial side of the palm (hypothenar eminence) and act together to move the little finger. ODM is responsible for flexion, lateral rotation, and opposition of the little finger.
The ulnar nerve is a branch of the brachial plexus, which is a group of nerves that originates in the cervical spine (neck). The ulnar nerve supplies the hypothenar muscles, including ODM. It passes through the hook of hamate and pisiform bone (Guyon's canal or ulnar tunnel), and gives rise to an articular branch that supplies the elbow joint. The ulnar nerve is very close to the skin at the elbow, making it susceptible to injury. Ulnar nerve entrapment can cause atrophy of the ODM, resulting in weakness in moving the little finger. Other symptoms include numbness, tingling, and pain in the ring and little fingers.
The ulnar nerve powers almost all of the small muscles in the hand, including the hypothenar muscles, the lumbricals to the ring and little fingers, the palmar and dorsal interossei muscles, the adductor pollicus, and the deep head of the flexor pollicus brevis. It also supplies two muscles in the anterior forearm: flexor carpi ulnaris and flexor digitorum profundus. The flexor carpi ulnaris flexes and adducts the hand at the wrist, while the flexor digitorum profundus flexes the ring and little fingers at the distal interphalangeal joint.
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ODM acts on the fifth carpometacarpal joint to cause finger flexion and lateral rotation
Opponens Digiti Minimi (ODM) is an intrinsic muscle of the hand. It is a small, triangular muscle that extends between the hamate bone (a carpal bone) and the fifth metacarpal bone. The hamate bone is located in the wrist, and the fifth metacarpal bone is located in the little finger.
The ODM is part of the hypothenar muscle group, which also includes the abductor digiti minimi and flexor digiti minimi brevis muscles. All three muscles are located in the hypothenar compartment of the hand, which is found on the ulnar side of the palm, between the wrist and the base of the little finger.
The ODM acts on the fifth carpometacarpal joint to cause finger flexion and lateral rotation. This movement helps to deepen the hollow of the palm. When finger flexion and lateral rotation at the carpometacarpal joint are combined with similar movements at the metacarpophalangeal and interphalangeal joints, it results in opposition of the little finger with the thumb. This opposition is important for a strong hand grip, which is useful in various sports such as baseball and rugby.
The ulnar nerve supplies the hypothenar muscles, including the ODM. It passes through the hook of hamate and pisiform bone (Guyon's canal). Compromise to the nerve at this point can lead to atrophy of the ODM and weakness in moving the little finger.
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Frequently asked questions
The ODM is the opponens digiti minimi, a muscle in the hand.
The opponens digiti minimi is an intrinsic muscle of the hand. It is part of the hypothenar muscle group, which also includes the abductor digiti minimi and flexor digiti minimi brevis muscles.
The opponens digiti minimi is a small, triangular muscle that extends between the hamate bone (a carpal bone) and the fifth metacarpal bone.
The opponens digiti minimi is responsible for flexion, lateral rotation and opposition of the little finger. This is important for gripping curved or irregular objects, such as a ball.
