Shoulder Muscles Quiz

Shoulder Adduction Muscles

• Key muscles that adduct the shoulder at the glenohumeral joint include:
  • Latissimus dorsi: Large back muscle crucial for extension, adduction, and internal rotation.
  • Teres major: Assists in medial rotation and adduction of the humerus.
  • Infraspinatus: Major rotator cuff muscle aiding in lateral rotation and adduction.
  • Teres Minor: A small muscle that also assists in lateral rotation and adduction.
  • Pectoralis major: Chest muscle involved in flexion and adduction of the shoulder.
  • Triceps brachii: Primarily an arm extensor, contributes to shoulder adduction.
  • Coracobrachialis: Helps in flexion and adduction of the arm.

Shoulder Abduction Muscles

• The primary muscles responsible for shoulder abduction at the glenohumeral joint are:
  • Deltoid (all fibers): Major muscle for shoulder abduction covering the shoulder joint.
  • Supraspinatus: Part of the rotator cuff, initiates shoulder abduction.

Mnemonic for Shoulder Adductors

• A mnemonic to remember shoulder adductors:
  • Lovers (Latissimus dorsi)
  • Throttled (Teres major)
  • Majorly (Pectoralis major)
  • If (Infraspinatus)
  • Thundering (Teres minor)
  • Muppets (Minor)
  • Pushed (Pectoralis)
  • Moaning (Major)
  • Tramps (Triceps)
  • Creatively (Coracobrachialis)

Mnemonic for Shoulder Abductors

• A mnemonic to remember shoulder abductors:
  • Dangerous (Deltoid)
  • Acrobatic (All fibers)
  • Supergirl (Supraspinatus)

Shoulder Adduction Muscles

• Muscles involved in shoulder adduction at the glenohumeral joint:
  • Latissimus dorsi: A large back muscle contributing to adduction.
  • Teres major: Assists in the movement of adducting the arm.
  • Infraspinatus: Primarily a rotator cuff muscle, it also aids in adduction.
  • Teres minor: Supports in adduction alongside rotation.
  • Pectoralis major: A major chest muscle that strongly adducts the shoulder.
  • Triceps brachii: Besides extending the elbow, it aids in shoulder adduction.
  • Coracobrachialis: Located on the upper arm, it contributes to shoulder adduction.

Shoulder Abduction Muscles

• Muscles responsible for shoulder abduction at the glenohumeral joint:
  • Deltoid (all fibers): The primary muscle for abduction, covering the shoulder joint.
  • Supraspinatus: A rotator cuff muscle that initiates the abduction process.

Adductor Mnemonic

• A mnemonic to remember shoulder adductor muscles:
  • Lovers - Latissimus dorsi
  • Throttled - Teres major
  • Majorly - Pectoralis major
  • If - Infraspinatus
  • Thundering - Teres minor
  • Muppets - Minor
  • Pushed - Pectoralis
  • Moaning - Major
  • Tramps - Triceps
  • Creatively - Coracobrachialis

Abductor Mnemonic

• A mnemonic for shoulder abductor muscles:
  • Dangerous - Deltoid
  • Acrobatic - All fibers
  • Supergirl - Supraspinatus

Test your knowledge on the muscles that adduct and abduct the shoulder at the glenohumeral joint. Recall important mnemonics to remember the shoulder adductors and abductors. Perfect for students of anatomy or physical therapy.