Unit 2 anatomy

pectineus origin

superior ramus of pubis

pectineus insertion

pectineal line of femur (inferior to lesser trochanter)

pectineus nerve

femoral nerve L2, L3

sometimes obturator nerve

pectineus action

adducts and flexes hip

assists internal rotation of hip

sartorius origin

anterior superior iliac spine (ASIS),

superior part of notch inferior to ASIS

sartorius insertion

superior part of medial surface of tibia (pes anserine)

sartorius nerve

femoral nerve L2, L3

sartorius action

flexes, ABducts, externally rotates hip,

flexes knee

psoas major origin

sides of T12-L5 vertebrae and discs

TP of all lumbar vertebrae

psoas major insertion

lesser trochanter of femur

psoas major nerve

anterior rami of lumbar L1,L2,L3

psoas major action

flex and stabilize hip

helps control trunk deviation (while standing)

iliacus origin

iliac crest, iliac fossa, ala of sacrum, anterior sacroiliac (SI) ligaments

iliacus insertion

tendon of psoas major, lesser trochanter, femur distal to it

iliacus nerve

Femoral nerve L2, L3

iliacus action

flex and stabilize hip joint

iliopsoas muscles

psoas major & iliacus

quadriceps femoris muscles

rectus femoris

vastus lateralis

vastus medialis

vastus intermedius

rectus femoris origin

Anterior inferior iliac spine (AIIS) and ilium superior to acetabulum

rectus femoris insertion

via common quadriceps tendon & independent attachments to base of patella,

via patellar ligament to tibial tuberosity

rectus femoris nerve

femoral nerve L2,L3,L4

rectus femoris action

extends knee;

stabilizes hip,

helps iliopsoas flex hip

vastus lateralis origin

greater trochanter &

lateral lip of linea aspera

vastus lateralis insertion

via common quadriceps tendon & independent attachments to base of patella,

via patellar ligament to tibial tuberosity,

tibia and patella via aponeurosis

vastus lateralis nerve

femoral nerve L2,L3,L4

vastus lateralis action

extends knee

vastus medialis origin

intertrochanteric line &

medial lip of linea aspera

vastus medialis insertion

via common quadriceps tendon & independent attachments to base of patella,

via patellar ligament to tibial tuberosity,

tibia and patella via aponeurosis

vastus medialis nerve

femoral nerve L2,L3,L4

vastus medialis action

extends knee

vastus intermedius origin

anterior and lateral surfaces of femur shaft

vastus intermedius insertion

via common quadriceps tendon & independent attachments to base of patella,

via patellar ligament to tibial tuberosity

vastus intermedius nerve

femoral nerve L2,3,4

vastus intermedius action

extends knee

adductor longus origin

body of pubis inferior to pubic crest

adductor longus insertion

middle 1/3 of linea aspera of femur

adductor longus nerve

obturator nerve L2, L3, L4

adductor longus action

adducts hip

adductor brevis origin

body and inferior ramus of pubis

adductor brevis insertion

pectineal line and proximal part of linea aspera of femur

adductor brevis nerve

obturator nerve L2, L3, L4

adductor brevis action

adducts hip, flexes hip to some extent

adductor magnus origin (adductor part)

inferior ramus of pubis,

ramus of ischium

adductor magnus origin (hamstring part)

ischial tuberosity

adductor magnus insertion (adductor part)

gluteal tuberosity,

linea aspera,

medial supracondylar line

adductor magnus insertion (hamstring part)

adductor tubercle of femur

Adductor magnus nerve (Adductor part)

obturator nerve L2, L3, L4

adductor magnus nerve (hamstring part)

tibial part of sciatic nerve L4

adductor magnus actions

both: adduct hip

Adductor: flexes hip

Hamstring: extends hip

gracilis origin

body and inferior ramus of pubis

gracilis insertion

Superior part of medial surface of tibia (pes anserine)

gracilis nerve

obturator nerve L2, L3

gracilis action

adducts hip,

flexes knee,

internally rotates knee when flexed

obturator externus origin

margins of obturator foramen and obturator membrane

obturator externus insertion

trochanteric fossa of femur

obturator externus nerve

obturator nerve L3, L4

obturator externus action

externally rotates and stabilizes hip

Femoral vs obturator nerve position to psoas major

Femoral nerve is lateral; obturator nerve is medial.

Vertebral level of center of gravity

S2

Vertebral level of iliac crest

L4

Saphenous nerve relation to adductor canal and hiatus

Travels through adductor canal, but not through adductor hiatus.

Patella gliding pathway

glides in the trochlear groove between the femoral condyles

Muscle passing through greater sciatic foramen

Piriformis

Average angle of inclination of the femur

126 degrees

Average angle of torsion of the femur

7 degrees

Structures passing deep to inguinal ligament

Iliopsoas, femoral nerve, femoral artery, and femoral vein

contents of the femoral triangle

saphenous nerve, nerve to vastus medialis, femoral nerve, femoral artery, femoral vein

where is the adductor hiatus?

opening in adductor magnus

does the saphenous nerve pass through the adductor hiatus?

no

gluteus maximus origin

ilium posterior to posterior gluteal line;