Major Muscle Groups Flashcards
What are the anterior flexors of the arm?
Biceps brachii.
Brachialis.
Coracobrachialis.
Musculocutaneous nerve.
What are the posterior extensors of the arm?
Triceps brachii.
Radial nerve.
What are the compartments of the forearm?
Anterior flexors (median and ulnar nerves).
Posterior extensors (radial nerve).
Posterior flexor (brachioradialis, musculocutaneous nerve).
What are the actions of the muscles of the hands and feet?
Hands - precision.
Forearm muscles provide strength.
Foot - supports walking, maintains foot arches.
What are the compartments of the glutes?
G. Maximus - extensor, inferior gluteal nerve.
G. Medius - abductor, superior gluteal nerve.
G. Minimus - abductor, superior gluteal nerve.
What does limb rotation in the womb cause?
Posterior flexors in the leg.
Anterior extensors in the leg.
What are the compartments of the thigh?
Hamstrings - sciatic nerve.
Quadriceps - femoral nerve.
Adductors - obturator nerve.
What are the compartments of the leg?
Anterior dorsiflexors.
Posterior plantarflexors.
Lateral evertors.
Sciatic nerve.
What joints do the biceps cross?
Shoulder and elbow - flexion.
Superoradioulnar - supination.
What joints do the triceps cross?
Shoulder and elbow.
What join does the pectoralis major cross?
Shoulder.
Describe the movements of the deltoid.
Anterior - flexion.
Lateral - abduction.
Posterior - extension.
Why do abdominal muscles have different fibre directions?
Strength and movement in many directions.
How can muscle injuries be diagnosed?
Assessing movement (bilaterally in pairs).
Muscle atrophy may occur from a muscle disorder, its innervation, or limb immobilisation.
What separates muscle compartments?
Intermuscular septa.
In what direction do oblique muscles pass each other?
At right angles.
Increases strength and integrity.
Which way does the rectus abdominis travel?
Vertically.
Rectus = straight muscles.
What is the shape of the muscles of the anterior abdominal wall?
Broad and flat.
Stabilises the trunk.
Maintains internal organ pressure.
What movements does the coracobrachialis permit?
Flexes the humerus.
Adducts the glenohumeral joint.
What is the function of the serratus anterior?
Pulls the scapula around the thoracic wall when it contracts.
Faces the glenoid cavity anteriorly, to face the arm anteriorly.
