Definition

1. Noun:
   • A muscle that inserts directly onto the capsule of a joint: An "articular muscle" is a specific type of skeletal muscle. Its defining characteristic is that its tendon attaches directly to the fibrous tissue (the capsule) surrounding a synovial joint, rather than to a bone. This allows it to influence the joint capsule directly.

Usage

• The term "articular muscle" is a technical anatomical term. It is used in medical, biological, and kinesiology contexts to describe muscles with this specific anatomical relationship to a joint.
• It is typically used in singular or plural form to classify or identify these muscles.

Examples of Usage

• Noun:
  • The subanconeus is considered an articular muscle of the elbow.
  • During the dissection, the students identified several small articular muscles around the knee joint.
  • The primary function of an articular muscle is often to retract or tense the joint capsule during movement.

Advanced Usage

• "Articularis genus": A specific and classic example of an articular muscle. It is a small muscle located above the knee that pulls the suprapatellar bursa upward during knee extension.
  • The articularis genus muscle prevents impingement of the joint capsule.

Variants and Related Words

• Articular (adj): Pertaining to a joint.
  • Articular cartilage covers the ends of bones within a joint.
• Muscle (n): A band or bundle of fibrous tissue that has the ability to contract, producing movement.
• Joint capsule (n): The fibrous connective tissue envelope that surrounds a synovial joint.

Synonyms

• Capsular muscle: A less common but technically accurate synonym, emphasizing the attachment to the joint capsule.

Notes

• Articular muscles are often small and may be considered vestigial or of minor importance for gross movement in humans. Their main role is considered to be proprioceptive (sensing joint position) and protective, by adjusting the tension of the joint capsule.
• Do not confuse "articular muscle" with muscles that cross and act upon a joint but attach to bones. The key distinction is the direct insertion onto the joint capsule itself.

Noun

1. a muscle that inserts directly onto the capsule of a joint