3.4 Anterior and Medial Thigh Flashcards
Psoas major origin and insertion
O: transverse processes, intervertebral discs, and bodies of T12-L5
I: lesser trochanter of femur
Psoas major action and nerve
A: flexes thigh and stabilizes trunk
N: L1-L3
Iliacus origin and insertion
O: superior 2/3 of iliac fossa
I: lesser trochanter
Iliacus action and nerve
A: flexes thigh and stabilizes trunk
N: femoral nerve
Pectineus origin and insertion
O: pectineal line of pubis
I: pectineal line of femur
Pectineus action and nerve
A: flexes and adducts thigh
N: femoral nerve
Sartorius origin and insertion
O: anterior superior iliac spine
I: superior medial tibia
Sartorius action and nerve
A: flexes, abducts, and laterally rotates thigh / flexes knee
N: femoral nerve
All of the quadriceps femoris insert into quadriceps femoris tendon which inserts into
Patella
What part of the quadriceps is the only quad muscle to span two joints
Rectus femoris
The quadriceps are all innervated by
The femoral nerve
Rectus femoris origin and insertion
O: AIIS and ilium
I: base of patella
Rectus femoris action and nerve
A: extends knee, flexes thigh
N: femoral nerve
Vastus lateralis origin and insertion
O: intertrochanteric line, greater trochanter and lateral linea aspera
I: base of patella
Vastus lateralis, intermedius, and medialis nerve and action
N: femoral nerve
A: extends knee
Vastus intermedius origin and insertion
O: anterior and lateral surface of shaft of femur
I: base of patella
Vastus medialis origin and insertion
O: intertrochanteric line and medial linea aspera
I: base of patella
Tendons of the quadriceps form the quadriceps tendon which continues as
The patellar ligament
The patellar ligament is attached to the
Tibial tuberosity
Large sesamoid bone (triangular shape)
Patella
Formed intrtendinously within quadriceps tendon, articulates with femur but not tibia
Patella
When the patellar ligament is tapped briskly contraction of quadriceps is elicited resulting in extension of knee joint
Quadriceps reflex
Exaggeration, slowing, or absense of the quadriceps reflex suggests that there may be
Damage to the central nervous system
The patella causes the force generated by the quadriceps femoris to be
More parallel to the line of action on the tibia
The patella is cartilagenous at birth and becomes ossified
Between 3rd to 6th year of age
Stretching, straining, and tearing away of tendinous origin of adductors
Pulled groin
Adductor longus origin and insertion
O: pubis, inferior to pubic crest
I: middle third of linea aspera
Adductor longus and brevis nerve and action
N: obturator nerve
A: adducts thigh
Adductor brevis origin and insertion
O: body and inferior ramps of pubis
I: pectineal line and proximal linea aspera
Obturator externus origin and insertion
O: outer surface of obturator membrane, bony boundaries of obturator foramen
I: trochanteric fossa of femur
Obturator externus nerve and action
N: obturator nerve
A: lateral rotation of thigh
Adductor magnus origin and insertion
O: inferior ramus of pubis, ramus of ischium, ischial tuberosity
I: gluteal tuberosity, linea aspera, adductor tubercle
Adductor magnus nerve and action
N: obturator nerve (adductor part) tibial part of sciatic nerve (hamstring part)
A: adducts thigh (adductor part) extends thigh (hamstring part)
Opening at inferior insertion of adductor magnus, forms the inferior end of adductor canal through which passes the femoral vessels
Adductor Hiatus
Gracilis origin and insertion
O: body and inferior ramus of pubis
I: superior part of medial surface of tibia
Gracilis nerve and action
N: obturator nerve
A: adducts thigh, flexes and medially rotates leg
The gracilis is a weak adductor and the only one in the group to
Cross the knee joint
