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ASMT- A&P2 #4
Intro to Lower Limb and Muscles of the Hip Joint
| Question | Answer |
|---|---|
| Deep Hip Rotator Muscles | obteratur internus, superior gemellus, inferior gemellus, quadratus femoris, piriformis, obturator externus |
| Obturator Externus (origin) | obturator foramen (external side) |
| Obturator Externus (insertion) | post. greater trochanter |
| Obturator Externus (function) | lat. rotation, abduction of flexed hip |
| Piriformis (origin) | ant. sacrum |
| Piriformus (insertion) | sup. greater trochanter |
| Piriformis (function) | lat. rotation, abduction of flexed hip |
| Piriformis (structure/relationship) | sciatic nerve usually passes b/w this muscle and the gemellus |
| Quadratus Femorus (origin) | lat. ischial tuberosity |
| Quadratus Femorus (insertion) | post. greater trochanter |
| Quadratus Femorus (function) | lat. rotation |
| Quadratus Femorus (structure/relationship) | most inferior of deep hip rotators, 4 sided muscle |
| Inferior Gemellus (origin) | lesser sciatic notch |
| Inferior Gemellus (insertion) | post. greater trochanter |
| Inferior Gemellus (function) | lat. rotation, abduction of flexed hip |
| Superior Gemellus (origin) | ischial spine |
| Superior Gemellus (insertion) | post. greater trochanter |
| Superior Gemellus (function) | lat. rotation, abduction of flexed hip |
| Superior Gemellus (structure/relationship) | sciatic nerve is usually found superior to this muscle |
| Obturator Internus (origin) | obturator foramen |
| Obturator Internus (insertion) | post. greater trochanter |
| Obturator Internus (function) | lat. rotation, abduction of flexed hip |
| Gluteal Muscles | gluteus minimus, gluteus medius, gluteus maximus, tensor fasciae latae |
| Tensor Fasciae Latae (origin) | ant. sup. iliac spine (ASIS) |
| Tensor Fasciae Latae (insertion) | IT band |
| Tensor Fasciae Latae (function) | flexion, abduction, and med. rotation of hip |
| Tensor Fasciae Latae (structure/relationship) | most superficial of gluteal muscles, only muscle in body that doesn't insert into bone |
| Gluteus Maximus (origin) | iliac crest, post. sacrum, coccyx |
| Gluteus Maximus (insertion) | 75% IT band, 25% gluteal tuberosity of femur (linea aspira) |
| Gluteus Maximus (function) | lat. rotation & extension of hip |
| Gluteus Maximus (structure/relationship) | largest of gluteal muscles, typically thickest/densest muscle in body |
| Gluteus Medius (origin) | sup. iliac fossa |
| Gluteus Medius (insertion) | lat. greater trochanter |
| Gluteus Medius (function) | abduction and med. rotation of hip |
| Gluteus Medius (structure/relationship) | middle muscle of gluteal muscles, the "walking" muscle |
| Gluteus Minimus (origin) | post. iliac fossa |
| Gluteus Minimus (insertion) | lat. greater trochanter |
| Gluteus Minimus (function) | abduction and med. rotation of hip |
| Gluteus Minimus (structure/relationship) | smallest & deepest of gluteal muscles |
| Hip Flexor Muscles | psoas, iliacus |
| Psaos (origin) | vert. bodies and discs of lumbar spine |
| Psaos (insertion) | lesser trochanter |
| Psaos (function) | flexion of hip |
| Psaos (structure/relationship) | only muscle to connect & cross over the upper body to the lower limb, most sciatic & back pain is caused by this muscle |
| Iliacus (origin) | internal iliac fossa |
| Iliacus (insertion) | lesser trochanter |
| Iliacus (function) | flexion of hip |
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