Lab 9 AOI's Flashcards
External intercostals
A: elevation of ribs during inhalation
O: inferior border of rib above
I: superior border of the rib below
Internal intercostals
A: depression of ribs during inspiration
O: superior border of rib below
I: inferior border of rib above
Diaphragm
A: contraction flattens during inspiration
O: ribs 5-10 and their costal cartilages; arcuate ligaments and L1-L3 vertebral bodies
I: central tendon
Rectus abdominis
A: flexion of trunk; compression of anterior abdominal wall
O: Pubic crest and symphysis pubis
I: xiphoid process and costal cartilages of ribs 1-3
Subscapularis
A: medial rotation of arm; holds head of humerus in glenoid cavity
O: subscapular fossa of scapula
I: lesser tubercle of humerus
Suprasinatus
A: abduction of arm; holds head of humerus in glenoid cavity
O: supraspinous fossa of scapula
I: greater tubercle of humerus
Infraspinatus
A: lateral rotation of arm; holds head of humerus in glenoid cavity
O: infraspinous fossa of scapula
I: greater tubercle of humerus
Teres major
A: medial rotation, adduction of arm; holds head of humerus in glenoid cavity
O: scapula (inferior angle and lateral border)
I: humerus (intertubercular sulcus)
Long head of biceps brachii
A: supination and flexion of forearm; flexion of arm
O: supraglenoid tubercle of scapula
I: radial tuberosity
Short head of biceps brachii
A: flexes elbow joint and supinates forearm
O: Coracoid process of scapula
I: radial tuberosity
Brachialis
A: flexion of forearm
O: humerus (anterior distal shaft)
I: Ulnar tuberosity and coronoid process of ulna
Iliacus
A: flexion of thigh
O: Iliac fossa; ala of sacrum
I: lesser trochanter of femur
Psoas major
A: flexion and lateral rotation of thigh; lateral flexion of trunk
O: body of T12; L1-L5 vertebrae (bodies, transverse processes and intervertebral discs)
I: lesser trochanter of femur
Sartorius
A: flexion, lateral rotation, and abduction of thigh; flexion of leg
O: anterior superior iliac spine
I: tibia (proximal medial shaft)
Adductor mangus
A: adduction and extension of thigh
O: pubis (inferior ramus); ischium (ramus and tuberosity)
I: femur (gluteal tuberosity, linea aspera, and adductor tubercle)
Adductor longus
A: adduction of thigh
O: pubis (body and inferior ramus)
I: femur (linea aspera)
Pectineus
A: adducts, flexes and medially rotates thigh
O: pubis (body and superior ramus)
I: femur (proximal posterior shaft)
Gracilis
A: adduction of thigh; flexion of leg
O: pubis (body and inferior ramus)
I: tibia (proximal medial shaft)
Rectus femoris
A: extension of leg; flexion of thigh
O: anterior inferior iliac spine
I: patella; tibial tuberosity
Vastus lateralis
A: extension of the leg
O: femur (greater trochanter and linea aspera)
I: patella; tibial tuberosity
Vastus medialis
A: extension of the leg
O: femur (intertrochanteric line and linea aspera)
I: patella, tibial tuberosity
Vastus intermedius
A: extension of leg
O: femur (anterolateral shaft)
I: patella; tibial tuberosity
Piriformis
A: lateral rotation of thigh
O: anterior sacrum
I: greater trochanter of femur
Gluteus maximus
A: extension, lateral rotation, and abduction of thigh
O: Ilium (ala); sacrum; coccyx
I: gluteal tuberosity of femur; iliotibial tract
Gluteus medius
A: abduction of thigh
O: Ilium (ala)
I: femur (greater trochanter)
Gluteus minimus
A: abduction of thigh
O: Ilium (ala)
I: femur (greater trochanter)
Long head of biceps femoris
A: flexion of leg; extension of thigh
O: Ischial tuberosity
I: head of fibula
Short head of biceps femoris
A: flexion of leg
O: femur (linea aspera)
I: head of fibula
Semitendinosus
A: flexion of leg; extension of thigh
O: Ischial tuberosity
I: tibia (proximal medial shaft)
Semimembranosus
A: flexion of leg; extension of thigh
O: Ischial tuberosity
I: medial condyle of tibia
Tibialis anterior
A: dorsiflexes and inverts foot
O: tibia (lateral condyle); anterior lateral shaft of tibia; interosseous membrane
I: metatarsal I; medial cuneiform
Extensor digitorum longus
A: extension of toes 2-5; dorsiflexion and inversion
O: tibia (lateral condyle); fibula (anterior shaft); interosseous membrane
I: distal phalanges of toes 2-5
(Peroneus) fibularis longus
A: plantar flexes and everts the foot
O: fibula (proximal shaft)
I: metatarsal I; medial cuneiform
Gastrocnemius
A: plantar flexion of foot; flexion of leg
O: medial and lateral condyles of femur
I: calcaneus
Soleus
A: plantar flexion of foot
O: proximal posterior shafts of tibia and fibula
I: calcaneus
Plantaris
A: plantar flexion of foot; flexion of leg
O: femur, (posterior distal shaft)
I: calcaneus
