Straight MSK anatomy Flashcards
What is the origin, insertion and action of the gastrocnemius?
Origin: posterior condoles of the femur
Insertion: calcaneus via the Achilles tendon
Action: Plantarflexion and weak knee flexion
What is the origin, insertion and action of the Soleus?
Origin: Posterior and medial tibia and fibula head
Insertion: calacaneus via the Achilles tendon
Action: Plantarflexion
What is the origin, insertion and action of the popliteus?
Origin: lateral epicondylitis of the femur
Insertion: Posterior tibia
Action: Initiates flexion of the knee and internal rotation of tibia
What is the origin, insertion and action of the tibialis anterior?
Origin: Upper 1/2 and lateral surface of the tibia
Insertion: Base of 1st metatarsal and medial cuneiform
Action: Dorsiflexion and inversion
What is the origin, insertion and action of the tibialis posterior?
Origin: Posterior tibia and fibula
Insertion: navicular, cineforms, cuboid and mets
Action: Plantarflexion and inversion
What is the origin, insertion and action of the peroneus longus?
Origin: proximal portion of the lateral fibula
Insertion: 1st metatarsal and medial cuneforms
Action: everts and Plantarflexion
What is the origin, insertion and action of the Peroneus brevis?
Origin: lower 2/3 of the lateral fibula
Insertion: Base of 5th metatarsal
Action: everts and plantar flexes the foot
What is the origin, insertion and action of the Flexor digitorum longus?
Origin: posterior surface of the tibia
Insertion: base of phalanges 1-4
Action: flexes toes and plantar flexes foot
What is the origin, insertion and action of the Extensor digitorum longus?
Origin: anterior surface of tibia and fibula
Insertion: phalanges 1-4
Action: extends toes and dorsiflexion
What is the origin, insertion and action of the Vastus medialis?
Origin: medial femur
Insertion: tibial tuberosity via patella tendon
Action: Extends knee
What is the origin, insertion and action of the Vastus lateralis?
Origin: lateral femur
Insertion: tibial tuberosity via patella tendon
Action: Extends knee
What is the origin, insertion and action of the Vastus intermedialis?
Origin: Anterior femur
Insertion: Tibial tuberosity via the patella tendon
Action: Extends knee
What is the origin, insertion and action of the Rectus femoris?
Origin: Anterior inferior iliac spine
Insertion: Tibial tuberosity via patella tendon
Action: Flexes hip and extends knee
What is the origin, insertion and action of the semimembranosus?
Origin: Ischial tuberosity
Insertion: Posterior portion of the medial condole of the tibia
Action: Flexes knee and extends hip
What is the origin, insertion and action of the Semitendinosus?
Origin: ischial tuberosity
Insertion: anteromedial portion of the proximal tibia
Action: Flexes knee and extends hip
What is the origin, insertion and action of the Biceps femoris?
Origin: ischial tuberosity and linea aspera of the femur
Insertion: fibular head
Action: flexes knee, extends hip and laterally rotates the leg.
What is the origin, insertion and action of the Sartorius?
Origin: anterior superior iliac spine
Insertion: anteromedial portion of proximal tibia
Action: Flexes, externally rotates and abducts hip.
What is the origin, insertion and action of the Gluteus maximus?
Origin: lateral sacrum and gluteal surface of ilium
Insertion: Gluteal tuberosity of femur and IT band
Action: extends and laterally rotates femur
What is the origin, insertion and action of the Gluteus medius?
Origin: gluteal surface of ilium
Insertion: greater trochanter
Action: abducts: femur
What is the origin, insertion and action of the Gluteus minimus?
Origin: gluteal surface of ilium
Insertion: greater trochanter
Action: abducts and medially rotates femur.
What is the origin, insertion and action of the Piriformis?
Origin: Anterior sacrum
Insertion: Greater trochanter
Action: Abducts and externally rotates femur
What is the origin, insertion and action of the Tensor fascia latae?
Origin: anterior superior iliac spine
Insertion: Lateral tibia via IT band
Action: Flexes and abducts hip
What is the origin, insertion and action of the Adductor longus?
Origin: remix of pubis
Insertion: middle 1/3 of linea aspera of femur
Action: Adducts femur
What is the origin, insertion and action of the Adductor brevis?
Origin: Remus of pubis
Insertion: lesser trochanter and linea aspera of the femur
Action: adducts femur
What is the origin, insertion and action of the Adductor Magnus?
Origin: ramis of pubis
Insertion: linea aspera and medial epicondyle femur
Action: adducts femur
What is the origin, insertion and action of the Gracilis?
Origin: ramis of pubis
Insertion: Anteromedial portion of proximal tibia
Action: adducts and flexes hip
What is the origin, insertion and action of the Petineus?
Origin: ramis of pubis
Insertion: pectineal line of the femur
Action: adduction, flexion and medial rotation of the femur.
What is the origin, insertion and action of the Coracobrachialis?
Coracoid process
Anteromedial surface of the humerus
Weakly flexes and adducts the shoulder
What is the origin, insertion and action of the Biceps brachii?
Supraglenoid tubercle and coracoid process
Head of radius
Flexes shoulder and arm and supinates forearm
What is the origin, insertion and action of the Brachialis?
Anterior surface of the distal half of the humerus
Coronoid process of the ulna
Flexes arm
What is the origin, insertion and action of the Brachoradialis?
Distal 1/3 of lateral humerus
Styloid process of the radius
Flexes forearm
What is the origin, insertion and action of the Triceps?
Infraglenhoid process posterior humerus
Olecranon process of ulna
Extends shoulder and extends elbow.
What is the origin, insertion and action of the supraspinatus?
Supraspinous fossa of the scapula
Greater tubercle of the humerus
Abducts arm
What is the origin, insertion and action of the infraspinatus?
Infraspinous fossa of scapula
Greater tuburcle of humerus
Externally rotates and adducts the shoulder
What is the origin, insertion and action of the teres minor?
Lateral border of the scapula
Greater tubercle of the humerus
Externally rotates and adducts the shoulder
What is the origin, insertion and action of the subscapularis?
Subscapular fossa of the scapula
Lesser tubercle of the humerus
Internally rotates the arm
What is the origin, insertion and action of the anconeus?
Lateral epicondyle of the humerus
Lateral portion of the olecronon process
Extension of forearm
What is the origin, insertion and action of the supinator?
Lateral epicondyle of humerus
Lateral shaft of proximal radius
Supination
What is the origin, insertion and action of the pronator teres?
Medial epicondlye of the humerus
Lateral shaft of the radius
Pronation
What is the origin, insertion and action of the pectoralis major?
Medial clavicle, sternum and ribs 1-6
Bicipital groove
Flexion, adduction and medial rotation of humerus
What is the origin, insertion and action of the pectoralis minor?
Ribs 3-5
Coracoid process
Protraction of scapula
What is the origin, insertion and action of the erector spinae?
Sacrum
Ribs, vertebrae, cranium
Extension of spine
What is the origin, insertion and action of the anterior scalenes?
TP of C3-C6
Rib 1
Side bend neck and elevate ribs
What is the origin, insertion and action of the middle scalenes?
TPs of C2-C7
Rib 1
Side bend neck and elevates ribs
What is the origin, insertion and action of the posterior scalenes?
TPs of C5-C7
Rib 2
Side bend neck and elevate ribs
What is the origin, insertion and action of the splenius capitis?
Nuchal ligament and SP of C7-T3
Mastoid process
Extend, rotate and laterally flex neck
What is the origin, insertion and action of the sternocleidomastoid?
Sternum and clavicle
Mastoid process
Rotate, side bend and flex neck
What is the origin, insertion and action of the levator scapulae?
TPs of C1-C4
Superior border of scapula
Elevates scapula
What is the origin, insertion and action of the latissimus dorsi?
SPs of T7-L5, iliac crest, 3 or 4 ribs,inferior angle of scapula
Bicipital groove of humerus
Adducts, internally rotates and extension of arm
What is the origin, insertion and action of the rhomboid minor?
SPs of C7-T1
Medial scapula
Elevates and retracts scapula
What is the origin, insertion and action of the rhomboid major?
SPs of T2-T5
Medial scapula
Elevates and retracts scapula
What is the origin, insertion and action of the trapezius?
SPs of C7-T12 and occiput
Lateral clavicle, acromion process and spine of scapula
Upper - elevates scapula
Middle - retracts scapula
Lower - depresses scapula
What is the origin, insertion and action of the teres major?
Inferior angle of the scapula
Bicipital groove
Internal rotation of the arm
What is the origin, insertion and action of the serratus anterior?
Ribs 1-9
Anterior scapula
Protracts scapula
What is the origin, insertion and action of the iliacus?
Iliac fossa
Lesser trochanter
Hip flexion
What is the origin, insertion and action of the rectus abdominis?
Pubic crest
Costal certilidge of ribs 5-7, xiphoid process of sternum
Flexion of lumbar spinae
What is the origin, insertion and action of the intercostals?
Ribs 1-11
Ribs 2-12
Elevates and depresses ribs
What is the origin, insertion and action of the internal obliques?
Inguinal ligament, iliac crest
Inferior ribs, xiphoid process
Rotates abdomen to the same side
What is the origin, insertion and action of the external obliques?
Lower 8 ribs
Iliac crest, Inguinal Ligament
Rotates torso
What is the origin, insertion and action of the quadratus lumborum?
Iliac crest
Rib 12 and TPs of lumbar spine
Lateral flexion and extension of vertebral column
What is the origin, insertion and action of the transverse abdominius?
Iliac crest, iliolumbar ligament, cartilidge of lower 6 ribs
Xiphoid process, linea alba and pubis
Compression of ribs and viscera.
What is the origin, insertion and action of the flexor carpi radialis?
Medial epicondyle
Base of 2nd and 3rd metacarpal
Flexion and abduction of wrist
What is the origin, insertion and action of the flexor carpi ulnaris?
Medial epicondyle
Pisiform, hamate and 5th metacarpal
Flexion and adduction of wrist
What is the origin, insertion and action of the entensor carpi radialis brevis?
Lateral epicondyle
Base of 3rd metacarpal
Extension of wrist
What is the origin, insertion and action of the extensor carpi radialis longus?
Lateral epicondyle
Base of 2nd metacarpal
Extension of wrist
What is the origin, insertion and action of the palmaris longus?
Medial epicondyle
Palmar aponeurosis
Wrist flexor
