ANATOMY
PELVIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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AIIS
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ASIS
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Body of Pubis
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Inferior Ramus of the Pubis
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Detailed explanation-1: -The rectus femoris arises from two tendons that originate from the anterior inferior iliac spine and the other from the ridge of the acetabulum.
Detailed explanation-2: -The rectus femoris has two heads of origin: the direct (straight) head and the indirect (reflected) head. The direct head arises from the anterior aspect of the inferior iliac spine (AIIS; a common site of avulsion), while the indirect head originates from the acetabular ridge.
Detailed explanation-3: -Where does the rectus femoris attach? This muscle attaches above (proximally) on the AIIS (Anterior Inferior Iliac Spine) of the pelvis. This is the small bump BELOW the bump that we call our “hip point.”
Detailed explanation-4: -Insertion. Rectus Femoris together with vastus medialis, vastus lateralis and vastus intermedius joins the quadriceps tendon to insert at the patella and tibial tuberosity (via patellar ligament).
Detailed explanation-5: -The direct head (DH) of the rectus femoris muscle arises from the anterior inferior iliac spine and the indirect head (IH) which originates from the supra-acetabular ridge form a conjoined tendon.