Podcast
Questions and Answers
Which muscle is primarily responsible for the adduction and flexion of the humerus?
Which muscle is primarily responsible for the adduction and flexion of the humerus?
- Teres major
- Pectoralis major (correct)
- Deltoid
- Latissimus dorsi
A weightlifter is performing a pull-up. Which muscle is primarily involved in the extension and adduction of the humerus during this exercise?
A weightlifter is performing a pull-up. Which muscle is primarily involved in the extension and adduction of the humerus during this exercise?
- Latissimus dorsi (correct)
- Deltoid
- Pectoralis major
- Coracobrachialis
Which action would be MOST compromised if an individual suffered damage to their coracobrachialis muscle?
Which action would be MOST compromised if an individual suffered damage to their coracobrachialis muscle?
- Abduction of the arm
- Extension of the arm
- Lateral rotation of the arm
- Adduction and flexion of the arm (correct)
A patient is having difficulty rotating their arm medially. Which muscle is MOST likely affected?
A patient is having difficulty rotating their arm medially. Which muscle is MOST likely affected?
What is the MOST significant role of the rotator cuff muscles as a group?
What is the MOST significant role of the rotator cuff muscles as a group?
Which rotator cuff muscle is primarily responsible for abduction of the shoulder?
Which rotator cuff muscle is primarily responsible for abduction of the shoulder?
If a baseball player is winding up to throw a ball, which rotator cuff muscles are MOST active in slowing down the arm's rotation before the throw?
If a baseball player is winding up to throw a ball, which rotator cuff muscles are MOST active in slowing down the arm's rotation before the throw?
What motion would likely be the most difficult if the sternocleidomastoid muscle was injured?
What motion would likely be the most difficult if the sternocleidomastoid muscle was injured?
A person is experiencing neck stiffness and pain when trying to turn their head. Which muscle is MOST likely involved?
A person is experiencing neck stiffness and pain when trying to turn their head. Which muscle is MOST likely involved?
Which movement would be MOST difficult to perform if an individual had a severe injury to their erector spinae group?
Which movement would be MOST difficult to perform if an individual had a severe injury to their erector spinae group?
What is the primary function of the transversus thoracis muscle?
What is the primary function of the transversus thoracis muscle?
What BEST describes the action of the internal intercostal muscles during breathing?
What BEST describes the action of the internal intercostal muscles during breathing?
During inhalation, which muscle's contraction causes an increase in the volume of the thoracic cavity?
During inhalation, which muscle's contraction causes an increase in the volume of the thoracic cavity?
Besides flexing the trunk, what other physiological processes does the rectus abdominis aid in?
Besides flexing the trunk, what other physiological processes does the rectus abdominis aid in?
Which set of actions is primarily facilitated by the external obliques?
Which set of actions is primarily facilitated by the external obliques?
The external obliques work with which muscle to flex and rotate the vertebral column?
The external obliques work with which muscle to flex and rotate the vertebral column?
What is the combined action of both the external obliques and transversus abdominis muscles?
What is the combined action of both the external obliques and transversus abdominis muscles?
A patient reports difficulty breathing, specifically with forced exhalation. Which muscle group is MOST likely impaired?
A patient reports difficulty breathing, specifically with forced exhalation. Which muscle group is MOST likely impaired?
An individual is experiencing difficulty laterally flexing their spine. Which muscle group is MOST likely affected?
An individual is experiencing difficulty laterally flexing their spine. Which muscle group is MOST likely affected?
A yoga practitioner is performing a twisting pose. Which muscle group is primarily engaged to facilitate the rotation of the vertebral column?
A yoga practitioner is performing a twisting pose. Which muscle group is primarily engaged to facilitate the rotation of the vertebral column?
Flashcards
Pectoralis Major action
Pectoralis Major action
Internal rotation, adduction, and flexion of the humerus.
Latissimus Dorsi action
Latissimus Dorsi action
Internal rotation, adduction, and extension of the humerus.
Deltoid (anterior) action
Deltoid (anterior) action
Medial rotation and flexion (anterior head).
Coracobrachialis action
Coracobrachialis action
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Teres Major action
Teres Major action
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Rotator Cuff function
Rotator Cuff function
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Subscapularis action
Subscapularis action
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Supraspinatus action
Supraspinatus action
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Infraspinatus & Teres Minor action
Infraspinatus & Teres Minor action
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Sternocleidomastoid action
Sternocleidomastoid action
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Splenius action
Splenius action
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Erector Spinae action
Erector Spinae action
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Transversus Thoracis action
Transversus Thoracis action
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Intercostal Muscles action
Intercostal Muscles action
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Diaphragm action
Diaphragm action
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Rectus Abdominis action
Rectus Abdominis action
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External Obliques action
External Obliques action
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Transversus Abdominis action
Transversus Abdominis action
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Study Notes
- The notes cover various muscles and their actions in the body.
Pectoralis Major
- Key actions include internal rotation, adduction, and flexion of the humerus.
Latissimus Dorsi
- Responsible for internal rotation, adduction, and extension of the humerus.
Deltoid
- The anterior head is involved in medial rotation and flexion.
Coracobrachialis
- Facilitates flexion and adduction of the arm.
Teres Major
- Primary functions involve medial rotation and adduction of the arm.
Rotator Cuff Group
- Stabilizes the shoulder joint.
- Decelerates movement at the shoulder.
- Subscapularis: Medially rotates the shoulder.
- Supraspinatus: Abducts the shoulder.
- Infraspinatus and Teres Minor: Laterally rotate the shoulder.
Sternocleidomastoid
- Flexes the head from side to side.
- Rotates the head.
Splenius
- Rotates the head and neck.
Erector Spinae Group
- Responsible for extending and laterally flexing the spine.
- Longissimus: Extends and laterally flexes the head and spine.
Transversus Thoracis
- Pulls the abdominal wall inwards.
Intercostal Muscles
- Keep ribs elevating and depressing during breathing.
Diaphragm
- Increases the volume of the thoracic cavity during breathing.
Rectus Abdominis
- Flexes the trunk.
- Aids in defecation and childbirth.
External Obliques
- Flex and rotate the vertebral column.
Transversus Abdominis
- Works with external obliques to flex and rotate the vertebral column.
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