MM O+I Review pg.2 Flashcards
(14 cards)
Anterior Scalene
O-Anterior tubercles of
TVP’s C3 - C6
I-Tubercle & ridge on upper
surface of the 1st rib (ant.
to groove for subclavian
a.) See N 37 for
subclavian orientation
A-Elevates 1st rib during
forced inspiration, lateral
flexion, flexion & rotation to
the opposite side of the CS
Aka contralateral rotation
Lev. Scap
O-Posterior tubercles of
TVP’s C1 - C4
I- Vertebral border of the
scapula superior to the
spine (incl superior angle)
A-Elevates scapula, rotates
scapula inferiorly & if
shoulder is fixed extension
& lateral flexion of the
cervical spine
Splenius Capitus
O-SP’s C7 - T3 & the inferior
1/2 of ligamentum
nuchae
I-Mastoid process & lateral
1/3 of the superior nuchal
line
A-Extension, lateral flexion &
rotation to the same side of
the head & CS
Sternocleidomastoid
O-Sternal head Anterior
surface of manubrium
Clavicular head Medial
1/3 of the clavicle
(superior surface)
I-Mastoid process & lateral
1/3 superior nuchal line
Note- fibre direction
superolateral thus pulls
head into contralateral
rotation
A-Flexion, ipsilateral lateral
flexion & rotation to the
opposite side of the CS.
Extends head (capital
extension) Elevates the
sternum & clavicle during
forced inspiration
Biceps Femoris
O-Long head: Ischial
tuberosity (with
semitendinosus tendon)
& Sacrotuberous lig. Short
head: Lateral lip of linea
aspera & proximal 2/3 of
lateral supracondylar
ridge of femur
I-Two heads unite just
above the knee & the
common tendon inserts
into the head of the fibula
A-Flexes & laterally rotates
leg at the knee joint & the
long head extends &
assists with lateral rotation
of thigh at the hip joint
Fibularis Brevis
O-Lower 2/3 of lateral surface of the fibula
A-Tuberosity of the 5th metatarsal
I- everts the foot at subtalar and transverse tarsal joints + assists with plantar flexion at the ankle joint.
Gastrocnemius
O- lateral head/ aspect of lateral condyle of femur and joint capsule. Medial head: popliteal surface of femur above the medial and joint capsule
I- Achilles tendon into the posterior surface of the calcaneus
A- plantar flexion of the ankle and assists flexion at the knee
Gluteus Medius
O-Ilium between anterior &
posterior gluteal line &
gluteal aponeurosis
I-Posterior-lateral surface
of greater trochanter of
femur
A-Abduction the hip Anterior:
Internal rotation & may
assist with flexion at hip
joint Posterior: External
rotation & may assist with
extension at the hip joint
Gracilis
O-Body & inferior ramus of
the pubis & ramus of the
ischium (only small
portion on ischium) N 480
I-Medial surface of
proximal part of shaft of
tibia (pes anserine)
A-Adducts thigh at the hip
joint, assists flexion &
medial rotation of leg at
knee joint
Semitendinosus
O-Ischial tuberosity (with
biceps long head tendon)
Shared origin- See N 481
I-Upper part of medial
surface of shaft of tibia
(pes anserine)
A-Flexes & medially rotates
leg at the knee joint &
extends & assists with
medial rotation of thigh at
the hip joint
piriformis
O-Anterior surface of
sacrum S2 - S4
I-Superior border of the
medial surface of greater
trochanter of femur
Superior to other three
medial GT insertions
A-External rotation at hip &
assits in abduction of hip
when flexed to 90 degrees
(or greater)
Sartorius
O- ASIS
I-Proximal part of medial
surface of shaft of tibia
(Pes Anserine) Most
anterior of 3 insertions on
pes anserine
A-Flexes, abducts & laterally
rotates thigh at the hip joint
& flexes & assists medial
rotation at knee joint Figure
4 position
Tibialis Ant.
O-Lateral condyle and upper
half of lateral surface of
shaft of tibia and
interosseous membrane
I-Medial cuneiform and
base of 1st metatarsal
A-Dorsiflexes the foot at
ankle jt. inverts the foot at
the subtalar and transverse
tarsal joints
Vastus Medialis
O-Intertrochanteric line,
medial lip of linea aspera
& medial deep fascial
septum Note-Origin on
medial aspect of
intertrochanteric line
I-Quadriceps tendon into
medial patella then via
patellar ligament to the
tibial tuberosity, some
fibers blend with the joint
capsule of the knee
(retinaula)
A-Extension at the knee joint
& strengthens the knee jt.
