I've been saving my favourite quadricep muscle for last!
RECTUS FEMORIS (Rec Fem) is special because not only does it cross the knee joint (and extend the leg - like the other three quad muscles) but it also crosses the HIP Joint
- help you to flex your hip.
Because of this, Rectus Femoris is part of the "Hip Flexor Group" - along with IlioPsoas
Rectus Femoris is superficial - it lives on top of the other quads. However, portions of the Sartorius and TFL muscle cross on top of Rec Fem (making them superficial to Rec Fem)
Muscle Attachment Points:
Origin: Anterior Inferior Iliac Spine (AIIS)
Insertion: Tibial Tuberosity
(same attachment point as the rest of the quads )
original image c/o studyblue.com
tibial tuberosity is just below the knee cap - on the tibia :)
Rectus Femoris Muscle Action(s):
a) extends the leg at the knee joint
b) flexes the thigh @ the hip (coxal) joint
(aka Hip Flexion)
a)
b)
And that's Rectus Femoris!
we're done the quads!
The other quads are:
and what do they all have in common?
They all join together, turn into the patellar ligament/tendon - and insert into the same place - the tibial tuberosity ! And they help you kick stuff..
BYE!
