Questions and Answers
What is the function of the Teres Major?
Which muscle rotates the arm laterally?
What is the primary action of the Pectoralis Major?
Adducts and flexes the humerus.
The quadriceps femoris includes rectus femoris and three other muscles that primarily __________ the knee.
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What does the Latissimus Dorsi do?
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The transverse abdominal helps to compress the ribs and viscera.
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What is the function of the Deltoid Muscles?
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What actions do the Trapezius perform?
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What is the role of the Rectus Abdominis?
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What is the main function of the gluteus maximus?
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What do the obliques do?
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What is the function of the internal intercostal muscles?
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What is the primary action of the Rhomboid Muscles?
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Study Notes
Teres Major
- Extends, adducts, and medially rotates the arm/humerus
- A flattened muscle that brings the arm toward the body, assisting in extending the arm from a flexed position
- Functions oppositely to Teres Minor and other rotator cuff muscles
Teres Minor
- Rotates the arm laterally and is a part of the rotator cuff
- Assists in bringing the arm toward the body and strengthens the shoulder joint
Pectoralis Major
- Responsible for adducting and flexing the humerus
- Aids in rotating the arm forward about the body's axis
- Assists latissimus dorsi and teres major during activities like mountain climbing by pulling the trunk upward
Quadriceps Femoris
- Comprised of rectus femoris (extends knee and flexes hips) and three vastus muscles (lateralis, medialis, intermedius), which primarily extend the knee
- Involved in leg movements and stabilization
Latissimus Dorsi
- Extends, adducts, and medially rotates the arm; pulls the shoulder downward and backward
- Functions primarily in arm adduction, crucial for pull-ups, rowing, or lowering heavy objects
- Medially rotates the arm, moving the front of the arm towards the body's midline
Transverse Abdominal
- Compresses the abdominal wall and laterally rotates the waist
- Provides thoracic and pelvic stability, acting as the body's natural weightlifting belt during lifts
Deltoid Muscles
- Facilitate raising arms sideways
- Anterior portion flexes and medially rotates the humerus
- Middle part abducts the humerus, while the posterior section extends and laterally rotates the humerus
Trapezius
- Elevates, depresses, retracts, and rotates the scapula; extends the head at the neck
- A wide, flat muscle covering the upper back
- Upper section elevates scapula, middle retracts it, and lower retracts and depresses it
Rectus Abdominis
- Flexes the vertebral column and compresses the abdomen
- Essential postural muscle, involved in movements like "crunch" sit-ups
Obliques
- Side abdominal muscles that pull the chest down and compress the abdominal cavity
- Involved in ipsilateral (same side) side-bending and contralateral (opposite side) rotation
Intercostal Muscles
- Located between the ribs, crucial for ventilation
- Facilitate chest cavity expansion and contraction for breathing
- Includes external (forced inhalation) and internal (forced expiration) muscles
Rhomboid Muscles
- Rhombus-shaped muscles associated with the scapula
- Primarily responsible for scapular retraction
Gluteus Maximus
- Main extensor of the hip, vital for maintaining trunk posture
- Engaged in various sports, including running and weightlifting
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Description
Test your knowledge of key anatomical terms and definitions with these flashcards. This quiz covers muscles such as the teres major and teres minor, focusing on their functions and locations in the body. Perfect for studying anatomy in the context of physical fitness and medicine.