The natatory ligaments limit abduction of the fingers and support the web. When these ligaments are torn or absent, excessive abduction can occur. The natatory ligaments can also become involved in Dupuytren contracture.

What is the function of palmar ligament?

In the human hand, palmar or volar plates (also referred to as palmar or volar ligaments) are found in the metacarpophalangeal (MCP) and interphalangeal (IP) joints, where they reinforce the joint capsules, enhance joint stability, and limit hyperextension.

What is the function of the deep transverse metacarpal ligament?

The deep transverse metacarpal ligament connects the palmar surfaces of the heads of the second, third, fourth, and fifth metacarpal bones. It is blended with the palmar metacarpophalangeal ligaments. Its palmar surface is concave where the flexor tendons pass over it.

What is palmar ligament?

The palmar ligaments (volar ligaments), more commonly termed as volar plates or palmar plates, are thick, dense, fibrocartilaginous structures, placed upon the volar surfaces of the MCP joints in the intervals between the collateral ligaments, to which they are connected; they are loosely united to the metacarpal bones ...

What is the primary function of the palmar plate at the MCP joints?

This ligament prevents the attached metacarpals from abduction at the CMC joints. The volar plate (palmar plate) provides a protective fibro-cartilaginous covering for the articular surfaces, which increases joint congruence. It increases anteroposterior stability of the MCP joint by limiting hyperextension.

Ligament Basics - Science Explained

33 related questions found

Does the thumb have a PIP or a dip?

Each of the digits, except the thumb, has three phalanges with three hinged joints: distal interphalangeal (DIP), proximal interphalangeal (PIP), and metacarpophalangeal (MCP) (figure 1), with a fingernail at the dorsal end (figure 2 and picture 1 and figure 3). ... The thumb is discussed below (see 'Thumb anatomy' below).

What is palmar radiocarpal ligament?

The palmar radiocarpal ligament (Volar Radiocarpal Ligament, anterior ligament) , is a broad membranous band, attached above to the anterior margin of the lower end of the radius, to its styloid process, and to the front of the lower end of the ulna; its fibers pass downward and medialward to be inserted into the volar ...

What is the radial collateral ligament?

The radial collateral ligament (RCL) is a strong, short, thin band of tissue that connects from the humerus (upper arm bone) to the radius (one of two forearm bones). The role of the RCL is to provide stability against inner to outer stress on the elbow. ... This acute injury can also coincide with elbow joint dislocation.

What are the Intercarpal ligaments?

The palmar intercarpal ligaments are fibrous bands that extend transversely across the palmar surfaces of the carpal bones, connecting adjacent carpals. These are the ligaments that define the structure of the ligamentous palmar arch.

Can you sprain your metacarpal?

Yes! Often fractures are obvious on physical examination, but severe sprains and contusions can also look and feel very much like a metacarpal fracture.

What is the deep transverse metatarsal ligaments?

The deep transverse metatarsal ligament (DTML), which is a series of 4 short ligamentous bands that span between the distal ends of adjacent metatarsal bones and intersect with the plantar ligaments of the metatarsophalangeal (MTP) joint, is a narrow band that runs across and connects the heads of the metatarsal bones.

What ligaments are in the hand?

radial and ulnar collateral ligaments – a pair of ligaments which bind the bones of the wrist and provide stability. volar radiocarpal ligaments – a complex web of ligaments that support the palm side of the wrist. dorsal radiocarpal ligaments – ligaments that support the back of the wrist.

What is dorsum hand?

The dorsum of hand (opisthenar area, dorsal area) is the corresponding area on the posterior part of the hand.

What is the ulnar collateral ligament?

An ulnar collateral ligament (UCL) tear is an injury to one of the ligaments on the inner side of your elbow. This ligament connects the inside of your upper arm (humerus) to the inside of your forearm (ulna) and helps support and stabilize your arm. The UCL is rarely stressed in daily activities.

Is Volar the same as palmar?

As adjectives the difference between palmar and volar

is that palmar is (anatomy|not comparable) of or pertaining to the palm of the hand or comparable appendage while volar is (anatomy) pertaining to the palm of the hand or the sole of the foot.

What does radial collateral ligament prevent?

Radial collateral ligament, which prevents varus movement (adduction/ ulnar deviation) of the forearm.

What is the role of the ulnar and radial collateral ligaments?

The anterior band of the medial or ulnar collateral ligament complex is the main stabilizer against valgus and internal rotation stress. The lateral collateral ligament complex resists excessive varus and external rotational stress. The lateral ulnar collateral ligament is the most important in terms of stability.

What does the lateral collateral ligament of the elbow do?

The lateral collateral ligament (LCL) complex is the soft tissue component that confers stability to varus stress of the elbow joint. The supinator, common extensor origin, anconeus and brachialis provide additional dynamic muscular stabilization of the LCL complex.

What movement can the wrist do?

The wrist joint also referred to as the radiocarpal joint is a condyloid synovial joint of the distal upper limb that connects and serves as a transition point between the forearm and hand. A condyloid joint is a modified ball and socket joint that allows for flexion, extension, abduction, and adduction movements.

Is scaphoid hand or wrist?

The scaphoid bone is one of the carpal bones on the thumb side of the wrist, just above the radius. The bone is important for both motion and stability in the wrist joint. The word "scaphoid" comes from the Greek term for "boat." The scaphoid bone resembles a boat with its relatively long, curved shape.

What is second metacarpophalangeal?

The metacarpophalangeal joints (MCP) are situated between the metacarpal bones and the proximal phalanges of the fingers. These joints are of the condyloid kind, formed by the reception of the rounded heads of the metacarpal bones into shallow cavities on the proximal ends of the proximal phalanges.

What is the top knuckle on your finger called?

Picture of Finger Anatomy

• The first and largest knuckle is the junction between the hand and the fingers - the metacarpophalangeal joint (MCP). ...
• The next knuckle out toward the fingernail is the proximal inter-phalangeal joint (PIP). ...
• The farthest joint of the finger is the distal inter-phalangeal joint (DIP).

Why does the thumb only have 2 phalanges?

Thumb. The thumb digit has only two phalanges (bones) so it only has one joint. ... The terminal extensor tendon in the thumb comes from the extensor pollicis longus muscle. The radial and ulnar collateral ligaments are important to provide stability of the fingertip during pinching.