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Hip Adduction Agonists

Adductor Brevis Adductor Longus Adductor Magnus Gracilis

Medial muscles of the hip - primarily involved in hip adduction

Adductor brevis Adductor longus Adductor magnus Gracilis

Anterior muscles primarily involved with flexion and pronation

Biceps brachii Brachialis Brachioradialis Pronator teres Pronator quadratus

Elbow flexors

Biceps brachii Brachialis Brachioradialis Weak assistance from Pronator teres

Radioulnar supinators

Biceps brachii Supinator Brachioradialis

Ulnar collateral ligament (UCL)

Critical in providing medial support to prevent elbow from abducting when stressed in physical activity.

Hip Extension Agonists

Gluteus Maximus Biceps Femoris (Long Head) Semitendinosus Semimembranosus

Hip External Rotation Agonists

Gluteus Maximus Six Deep External Rotators

Hip Abduction Agonists

Gluteus Medius Tensor Fasciae Latae Gluteus Maximus Gluteus Minimus

Hip Internal Rotation Agonists

Gluteus Minimus Gluteus Medius Tensor Fasciae Latae

Posterior muscles of the hip - primarily involved in hip extension

Gluteus maximus Biceps femoris Semitendinosus Semimembranosus External rotators

Lateral muscles of the hip - primarily involved in hip abduction

Gluteus medius Gluteus minimus External rotators Tensor fasciae latae

Six Deep External Rotators

Piriformis Gemellus superior Gemellus inferior Obturator internus Obturator externus Quadratus femoris

Radioulnar pronators

Pronator teres Pronator quadratus Brachioradialis

Annular ligament

Provides a sling effect around radial head for stability

Radial collateral ligament

Provides lateral stability & is rarely injured

Hip Flexion Agonists

Psoas Iliacus (Iliopsoas) Rectus Femoris Pectineus Sartorius Tensor Fascia Latae

The ulna and radius...

Serve as distal attachments for muscles that flex & extend the elbow.

The scapula and humerus...

Serve as proximal attachments for muscles that flex & extend the elbow.

Scapula, humerus, & ulna...

Serve as proximal attachments for muscles that pronate & supinate the radioulnar joints.

Posterior muscles primarily involved with extension and supination

Triceps brachii Anconeus Supinator

Elbow extensors

Triceps brachii Anconeus provides assistance

Which of the following is not an action of the pectineus muscle? a. abduction of the hip b. adduction of the hip c. external rotation of the hip d. flexion of the hip

a. abduction of the hip

The gluteus medius muscle is located ____ and performs ____? a. medially, adduction b. laterally, abduction c. anteriorly, flexion d. posteriorly, extension

a. medially, adduction

Agonist muscles during hip extension include all of the following except? a. sartorius b. semitendinosus c. biceps femoris d. gluteus maximus

a. sartorius

Which of the following is considered to be an agonist muscle during hip external rotation? a. TFL b. gluteus maximus c. adductor brevis d. biceps femoris

b. gluteus maximus

Which of the following is considered to be an agonist muscle during hip abduction? a. iliopsoas b. gluteus medius c. pectineus d. semimembranosus

b. gluteus medius

The iliopsoas muscle is located ____ and performs ____? a. medially, adduction b. laterally, abduction c. anteriorly, flexion d. posteriorly, extension

b. laterally, abduction

The sartorius muscle is located ____ and performs ____? a. medially, adduction b. laterally, abduction c. anteriorly, flexion d. posteriorly, extension

c. anteriorly, flexion

All of the following are bony landmarks located on the humerus except? a. lateral condyloid ridge b. olecranon fossa c. coronoid fossa d. coronoid process

d. coronoid process

The biceps femoris muscle is located ____ and performs ____? a. medially, adduction b. laterally, abduction c. anteriorly, flexion d. posteriorly, extension

d. posteriorly, extension

The semimembranous muscle is located ____ and performs ____? a. medially, adduction b. laterally, abduction c. anteriorly, flexion d. posteriorly, extension

d. posteriorly, extension


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