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Questions and Answers
What is the origin of the serratus anterior muscle?
What is the origin of the serratus anterior muscle?
What is the purpose of the scapular wall slide exercise?
What is the purpose of the scapular wall slide exercise?
What is the primary function of the serratus anterior muscle during arm movements?
What is the primary function of the serratus anterior muscle during arm movements?
What is a common consequence of weakness in the serratus anterior muscle?
What is a common consequence of weakness in the serratus anterior muscle?
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What is the term for abnormal movement patterns of the scapula?
What is the term for abnormal movement patterns of the scapula?
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Which of the following injuries is NOT directly related to weakness in the serratus anterior muscle?
Which of the following injuries is NOT directly related to weakness in the serratus anterior muscle?
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Which of the following muscles is superficial to the rhomboid muscles?
Which of the following muscles is superficial to the rhomboid muscles?
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What is the primary function of the rhomboid muscles?
What is the primary function of the rhomboid muscles?
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What is a common injury affecting the rhomboid muscles?
What is a common injury affecting the rhomboid muscles?
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Which exercise is beneficial for strengthening the rhomboid muscles?
Which exercise is beneficial for strengthening the rhomboid muscles?
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What is the purpose of the chest stretches?
What is the purpose of the chest stretches?
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What is a common symptom of rhomboid muscle injuries?
What is a common symptom of rhomboid muscle injuries?
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Study Notes
Serratus Anterior
Anatomy
- Origin: Ribs 1-9
- Insertion: Medial border of scapula
- Innervation: Long thoracic nerve (C5-C7)
- Blood supply: Lateral thoracic artery
Strengthening Exercises
- Scapular wall slide: Stand with feet shoulder-width apart, arms at sides, and hands on wall at shoulder height. Slowly slide arms up the wall, squeezing shoulder blades together.
- Push-up with rotation: Perform a push-up, then rotate torso to left and right, keeping arms straight.
- Cable rotations: Hold cable handle with both hands, arms extended. Rotate torso to left and right, keeping arms straight.
Function
- Helps to rotate scapula during arm movements
- Assists in upward rotation of scapula during abduction and flexion
- Stabilizes scapula during shoulder movements
Relationship to Scapular Stability
- Serratus anterior helps to maintain proper scapular alignment and rotation
- Weakness in serratus anterior can lead to scapular winging and poor posture
- Strengthening serratus anterior can improve scapular stability and reduce risk of injury
Injuries
- Winging scapula: Weakness in serratus anterior causes scapula to protrude from back
- Scapular dyskinesis: Abnormal movement patterns of scapula, often caused by serratus anterior weakness
- Shoulder impingement: Weakness in serratus anterior can contribute to shoulder impingement syndrome
Serratus Anterior
Anatomy
- Originate from ribs 1-9
- Insert into the medial border of the scapula
- Innervated by the long thoracic nerve (C5-C7)
- Supplied by the lateral thoracic artery
Strengthening Exercises
- Scapular wall slide: Stand with feet shoulder-width apart, arms at sides, and hands on wall at shoulder height, then slowly slide arms up the wall, squeezing shoulder blades together
- Push-up with rotation: Perform a push-up, then rotate torso to left and right, keeping arms straight
- Cable rotations: Hold cable handle with both hands, arms extended, then rotate torso to left and right, keeping arms straight
Function
- Helps rotate scapula during arm movements
- Assists in upward rotation of scapula during abduction and flexion
- Stabilizes scapula during shoulder movements
Relationship to Scapular Stability
- Helps maintain proper scapular alignment and rotation
- Weakness leads to scapular winging and poor posture
- Strengthening improves scapular stability and reduces injury risk
Injuries
- Winging scapula: Weakness causes scapula to protrude from back
- Scapular dyskinesis: Abnormal movement patterns, often caused by weakness
- Shoulder impingement: Weakness contributes to shoulder impingement syndrome
Anatomy of Rhomboid Muscles
- Rhomboid muscles consist of four muscles: rhomboid minor, rhomboid major, and rhomboid intermedius (not always present)
- Originate from the spinous processes of thoracic vertebrae (T2-T5)
- Insert into the medial border of the scapula
- Located deep to the trapezius muscle and superficial to the serratus anterior muscle
Functions of Rhomboid Muscles
- Stabilize the scapula
- Rotate the scapula downward
- Adduct the scapula (bring it towards the spine)
- Assist in upward phase of scapular rotation
- Maintain proper posture and movement of the shoulder blade
Rhomboid Muscle Injuries
- Common injuries: strains, trigger points, poor posture
- Strains: overstretching or tearing of muscle fibers
- Trigger points: areas of muscle tissue that become inflamed and painful
- Poor posture: leading to chronic strain and fatigue
- Symptoms: pain or tenderness in the upper back, weakness or fatigue in the shoulder or arm, difficulty performing daily activities
Exercises for Rhomboid Muscles
- Strengthening exercises:
- Rowing exercises (e.g. bent-over rows, seated rows)
- Scapular squeezes
- Superman (lying on stomach with arms extended, lifting arms and shoulders off the ground)
- Stretching exercises:
- Chest stretches (to improve posture and reduce strain on rhomboid muscles)
- Scapular wall slide (standing with back against a wall, sliding the shoulder blades down and back)
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Description
Learn about the origin, insertion, innervation, and blood supply of the Serratus Anterior muscle, as well as exercises to strengthen it.
