Practical Flashcards
Deltoid (anterior)
0: lateral 3rd of clavicle, acromion
I: deltoid tuberosity
A: strong flexion & internal rotation of the shoulder, some horizontal ADD
Infraspinatus
0: infraspinous fossa
I: greater tubercle of humerus
A: shoulder Er, stabilizes the head of humerus, HABD and ext
Lat. Dorsi
O: the spinous process of T6-12, thoraco-lumbar fascia, iliac crest, inferior 3-4 ribs
I: intertubercular groove of the humerus
A: shoulder ext, hyperextension, addiction and internal rotation
Pec. Major
0: clavicular head: medial half of clavicle
Sternalcostal head: anterior surface of sternum, 1-6 costal cartilages
I: intertubercular groove of humerus
A: addiction and internal rotation of humerus
clavicular head: flexion of shoulder (60 degrees)
sternocostal head: extension from flexed position
rotates the scapula downward, protracts the scapula, depresses the scapula
Upper Trapezius
0: occipital bone, nuchal ligament, spinous processes of cervical spine
I: lateral 3rd of clavicle, acromion and spine of scapula
A: extension of the cervical spine, elevates scapula, ipsilateral side flexion of cervical spine & contralateral rotation of cervical spine (head to opposite side)
Rhomboids
Major:
O: spinous process of T 2-5
I: medial border of scapula from spine to inferior angle
Minor:
0: spinous process of C7-t1
I: superior part of the medial border of scapula
A: retract the scapula and rotate it downwards
And elevate the scapula
Bicep brachii
0: long head: supraglenoid fossa of scapula
Short head: coracoid process of scapula
I: tuberosity of radius
A: supinates the forearm flexes from supinated position. Weak shoulder flexion
Triceps brachii
0: Long head: infraglenoid fossa of scapula
lateral head: posterior humerus, upper half
medial head: posterior humerus, lower half
I: proximal end of the olecranon of ulna
A: Main extensor of forearm, helps extend and adduct shoulder
Erector spinae (spinalis+longissimus+illicostalis)
Common origin: broad tendon from iliac crest, posterior sacrum
I: Spinalis : upper thoracic sipinous processes
Longissimus: ribs & mastoid process of temporal bone
Iliocostalis: angles of ribs
A: extension of trunk and neck and ipsilateral side flexion of the trunk and neck
Serratus anterior
0: ribs 1-8
I: anterior surface of vertebral border of scapula
A: protracts the scapula and rotates the scapula upward
Rectus abdominis
0: pubic symphysis
I: ribs 5-7 and xiphoid process of sternum
A: flexion of the trunk, compresses abdomen
External oblique
0:inferior 8 ribs
I: linea alba, iliac crest
A: trunk flexion, trunk side flexion same side(ipsilateral), rot to opposite side (contralateral)
Illiopsoas (iliacus + psoas major)
Psoas Major:
0: lumbar vertebrae and iliac fossa
I: lesser trochanter of femur
A: hip hexion & lumbar flexion
Iliacus:
0: iliac fossa and base of sacrum
I: greater psoas tendon and lesser trochanter of femur
A: hip flexion
Gluteus Maximus
0: posterior sacrum and ilium
I: iliotibial band and gluteal tuberosity
A: hip extension and internal rotation
Gluteus Medius and Gluteus Minimus
0: lateral surface of ilium
I: greater trochanter of femur
A: hip internal rotation and hip abduction