Definition

1. Noun:
   • A skeletal muscle that draws down the scapula or raises the ribs: The "pectoralis minor" is a thin, triangular muscle situated beneath the larger pectoralis major. Its primary functions are to stabilize the scapula (shoulder blade) by drawing it downward and anteriorly against the thoracic wall, and to assist in raising the ribs during forced inhalation.

Usage Examples

• Noun:
  • Tightness in the pectoralis minor can contribute to rounded shoulders and poor posture.
  • During the dissection, we identified the pectoralis minor lying deep to the pectoralis major.
  • The physical therapist focused on stretching the patient's pectoralis minor to alleviate shoulder pain.

Advanced Usage

• Anatomical Context: In medical and anatomical descriptions, the "pectoralis minor" is often discussed in relation to the brachial plexus and axillary artery, as these structures pass deep to it.

  • The surgeon carefully retracted the pectoralis minor to access the underlying neurovascular structures.

• Clinical/Rehabilitation Context: The muscle is frequently referenced in discussions of thoracic outlet syndrome or postural correction exercises.

  • Strengthening the lower trapezius and serratus anterior helps to counteract a dominant pectoralis minor.

Variants and Related Words

• Pectoralis major (n): The larger, more superficial chest muscle responsible for movements like adduction and medial rotation of the arm.
• Pectoral (adj): Relating to the chest or breast. (e.g., pectoral muscles, pectoral girdle).
• Minor (adj): Smaller or lesser in size, importance, or degree. Used in anatomical names to denote a smaller muscle relative to a "major" one.

Synonyms

• Musculus pectoralis minor (n): The full Latin anatomical term.
• Smaller chest muscle (n): A descriptive, non-technical synonym (though less precise).

Related Phrases

• Pectoralis minor syndrome: A potential component of thoracic outlet syndrome where a tight pectoralis minor muscle compresses neurovascular structures.

  • The patient's symptoms were consistent with pectoralis minor syndrome.

• Pectoralis minor tendon: Refers to the tendon by which the muscle inserts onto the coracoid process of the scapula.

  • The tear was located at the pectoralis minor tendon.

Notes on Meaning

• The term specifically and exclusively refers to this particular skeletal muscle. It is not used in a general or figurative sense.
• Its name derives from Latin: (of the chest) and (smaller).

Noun

1. a skeletal muscle that draws down the scapula or raises the ribs