Podcast
Questions and Answers
Which muscle acts as an antagonist to the Quadriceps?
Which muscle acts as an antagonist to the Quadriceps?
What is the insertion point of the Gastrocnemius muscle?
What is the insertion point of the Gastrocnemius muscle?
Which of the following muscles originates from the pelvis and extends the knee joint?
Which of the following muscles originates from the pelvis and extends the knee joint?
Which muscle is primarily responsible for plantar flexion of the ankle?
Which muscle is primarily responsible for plantar flexion of the ankle?
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What is the action of the Biceps Brachii?
What is the action of the Biceps Brachii?
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Which muscle is responsible for the action of extending the elbow joint?
Which muscle is responsible for the action of extending the elbow joint?
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What movement is described as increasing the angle of a joint?
What movement is described as increasing the angle of a joint?
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What does the term 'abduction' refer to in movement terminology?
What does the term 'abduction' refer to in movement terminology?
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In which type of muscle contraction does movement occur?
In which type of muscle contraction does movement occur?
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Which antagonistic muscle is paired with the Pectoralis Major?
Which antagonistic muscle is paired with the Pectoralis Major?
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What action do the External Abdominal Obliques perform aside from flexing the spine?
What action do the External Abdominal Obliques perform aside from flexing the spine?
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Which muscle is responsible for moving the scapula up, down, and rotating it?
Which muscle is responsible for moving the scapula up, down, and rotating it?
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Study Notes
Movement Terms
- Flexion: Decreasing the angle of a joint (e.g., bending the elbow)
- Extension: Increasing the angle of a joint (e.g., straightening the elbow)
- Rotation: Turning a joint (e.g., rotating the shoulders medially or laterally)
- Abduction: Movement away from the midline (e.g., raising your arm)
- Adduction: Movement towards the midline (e.g., lowering your arm)
Muscle Terminology
- Origin: Bone that the muscle attaches to, and does not move.
- Insertion: Bone that the muscle attaches to, and does move.
- Isometric Contraction: Muscle contracts, but no movement occurs (e.g., pushing on a stationary object)
- Isotonic Contraction: Muscle contracts with movement occurring (e.g., lifting a weight)
Common Superficial Muscles
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Biceps Brachii:
- Action: Flexes the elbow joint
- Origin: Scapula
- Insertion: Radius
- Antagonist: Triceps Brachii
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Triceps Brachii:
- Action: Extends the elbow joint
- Origin: Proximal end of the humerus
- Insertion: Proximal end of the ulna
- Antagonist: Biceps Brachii
-
Deltoids:
- Action: Abducts the arm (raises the arm)
- Origin: Clavicle and sternum
- Insertion: Humerus
- Antagonist: Pectoralis Major and Latissimus Dorsi
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Pectoralis Major:
- Action: Rotates the shoulders anteriorly
- Antagonist: Latissimus Dorsi
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Latissimus Dorsi:
- Action: Rotates the shoulders posteriorly
- Antagonist: Pectoralis Major
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Trapezius:
- Action: Moves the scapula up, down, and rotates it
- Origin: Thoracic and cervical spine, base of skull
- Insertion: Clavicle and scapula
-
Rectus Abdominis:
- Action: Flexes the spine (bending forward)
- Origin: Anterior part of pelvis
- Insertion: Costal cartilage of the ribs
-
External Abdominal Obliques:
- Action: Similar to Rectus Abdominis, but can rotate the torso to one side.
- Origin: Pelvis and ribs
- Insertion: Ribs
-
Gluteus Maximus:
- Action: Extends the hip joint (moving the leg backward)
- Origin: Pelvis
- Insertion: Femur
- Antagonist: Iliopsoas
-
Iliopsoas:
- Action: Flexes the hip joint (e.g., kicking a ball)
- Antagonist: Gluteus Maximus
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Biceps Femoris (Hamstrings):
- Action: Flexes the knee joint (bending the knee)
- Origin: Pelvis and femur
- Insertion: Tibia and fibula
- Antagonist: Quadriceps
-
Quadriceps:
- Action: Extends the knee joint (straightening the knee)
- Origin: Pelvis and femur
- Insertion: Patella and tibia
- Antagonist: Biceps Femoris (Hamstrings)
-
Sartorius:
- Action: Rotates the knee laterally (e.g., sitting cross-legged)
- Origin: Lateral part of pelvis
- Insertion: Medial part of tibia
-
Gastrocnemius:
- Action: Plantar flexion of the ankle (bending the foot downward)
- Origin: Femur
- Insertion: Calcaneus (heel bone)
- Antagonist: Tibialis Anterior
-
Tibialis Anterior:
- Action: Dorsiflexion of the ankle (bending the foot upward)
- Origin: Tibia
- Insertion: Tarsal bones
- Antagonist: Gastrocnemius
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Description
Test your knowledge on key terms related to human movement and muscle anatomy. This quiz covers definitions of movement terms like flexion and extension, as well as important muscle terminology and some common superficial muscles. Ideal for students of anatomy and physiology!
