Lesson 10 & 11 Muscle Origins/Insertions
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superjsgirl on October 29, 2011
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Muscles Origins and Insertions of Lesson 10 & 11
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28 terms
Terms | Definitions |
|---|---|
 Piriformis | Origin: Anterior Sacrum Insertion: Greater Trochanter Actions: Laterally rotates the hip |
| Tensor Fasciae Latae | Origins: Anterior iliac crest Anterior superior iliac spine (ASIS) Insertion: lliotibial band Actions: Abducts the hip Flexes the hip Medially rotates the hip |
| Gluteus Maximus | Origins: Posterior sacrum Posterior Coccyx Posterior iliac crest External ilium to the posterior gluteal line Insertions: Gluteal tuberosity (25%) lliotibial band (75%) Actions: Extends the hip Laterally rotates the hip Adducts the hip Posteriorly tilts the pelvis |
| Gluteus Medius | Origin: External ilium between the anterior & posterior gluteal lines Insertion: Greater trochanter Actions: Abducts the hip Medially rotates the hip Laterally rotates the hip Anteriorly and posteriorly tilt the pelvis |
| Gluteus Minimus | Origin: External ilium between the anterior & inferior gluteal lines Insertion: Greater trochanter Actions: Abducts the hip Medially rotates the hip Laterally rotates the hip Anteriorly & posteriorly tilts the pelvis |
| Gracilis | Origin: Inferior pubic ramus Insertion: Medial proximal tibial shaft (at the pes anserinus) Actions: Adducts the hip Flexes the hip Flexes the knee Medially rotates the leg (when the knee is flexed) |
| Adductor Magnus | Origins: Ischial tuberosity Inferior pubic ramus Ischial ramus Insertions: Linea Aspera Adductor tubercle of the femus Actions: Adducts the hip Flexes the hip Extends the hip |
| Adductor Longus | Origin: Anterior pubic body Insertion: Middle 3rd of the linea aspera (medial lip) Action: Adducts the hip |
| Adductor Brevis | Origin: Inferior pubic ramus Insertion: Proximal 3rd of the linea aspera (medial lip) Action: Adducts the hip |
| Pectineus | Origins: Superior pubic ramus Insertion: Posterior proximal femoral shaft (inferior to lesser trochanter) Actions: Flexes the hip Adducts the hip |
| Vastus Medialis | Origins: Linea aspera (medial lip) Intertrochanteric line Insertion: Tibial tuberosity Action: Extends the knee |
| Vastus Lateralis | Origins: Linea aspera (lateral lip) Insertion: Tibial tuberosity Action: Extends the knee |
| Sartorius | Origin: Anterior superior iliac spine (ASIS) Insertion: Medial proximal tibial shaft (at pes anserine) Actions: Flexes the hip Laterally rotates the hip Abducts the hip Flexes the knee Medially rotates the leg (when the knee is flexed) |
| Semimembranosus | Origin: Ischial tuberosity Insertion: Medial condyle of the tibia (posterior surface) Actions: Flexes the knee Medially rotates the leg (when the knee is flexed) Extends the hip Medially rotates the hip Posteriorly tilts the pelvis |
| Semitendinosus | Origin: Ischial tuberosity Insertion: Medial proximal tibial shaft (at the pes anserinus) Actions: Flexes the knee Medially rotates the leg (when the knee is flexed) Extends the hip Medially rotates the hip Posteriorly tilts the pelvis |
| Biceps Femoris | Origins: Ischial tuberosity (long head) Linea aspera; lower lateral lip (short head) Insertion: Fibular head Actions: Flexes the knee Laterally rotates the leg (when knee is flexed) Extends the hip Laterally rotates the hip Posteriorly tilts the pelvis |
| Psoas Major | Origins: Transverse processes of T12-L5 Vertebral bodies of T12-L5 Intervertebral disk of lumber vertebrae Insertion: Lesser Trochanter Actions: Laterally rotates the hip -Unilateral contraction Flexes the hip- Unilateral or Bilateral contraction Flexes the vertebral column - Bilateral contraction Anteriorly tilts the pelvis - Bilateral contraction |
| Iliacus | Origins: lliac fossa Anterior inferior iliac spine Insertion: Lesser trochanter Actions: Flexes the hip-Unilateral or Bilateral contraction Laterally rotates the hip - Unilateral contraction Anteriorly tilts the pelvis - Bilateral contraction |
| Rectus Femoris | Origins: Anterior inferior iliac spine (AIIS) External ilium just superior to the acetabulum Insertion: Tibial tuberosity Actions: Flexes the hip Extends the knee Anteriorly tilts the pelvis |
| Rectus Femoris is the only.. | muscles of the quads that crosses both the hip and knee joint. |
| Tibialis Anterior | Origins: Proximal 1/2 of the lateral tibial shaft Interosseous membrane Insertions: Metatarsal 1 Cuneiform 1 (plantar surface) Actions: Dorsiflexes the ankle Inverts the foot |
| Tibialis Posterior | Origins: Posterior tibial shaft Posterior fibular shaft Interossuous membrane Insertions: Tuberosity of navicular (plantar surface) Cuneiforms 1, 2 and 3 Cuboid Calcaneus Navicular Bases of metatarsals 2,3 and 4 Actions: Inverts the foot Plantar flexes the ankle |
| Fibularis Longus | Origins: Fibular head Lateral proximal 1/2 of the fibular shaft Insertions: Metatarsal 1 Cuneiform 1 (plantar surface) Actions: Everts the foot Plantar flexes the ankle |
| Fibularis longus & tibialis anterior are known as | The Stirrup Muscles |
| Fibularis Brevis | Origin: Lateral distal 1/2 of the fibular shaft Insertion: Metatarsal 5 Actions: Everts the foot Plantar flexes the ankle |
| Gastrocnemius | Origins: Medial epicondyle of the femur Lateral epiccondyle of the femur Insertion: Calcaneus via the Achilles tendon Action: Plantar flexes the ankle Flexes the knee |
| Plantaris | Origin: Lateral epicondyle of the femur Insertion: Calcaneus via the Achilles tendon Actions: Plantar flexes the ankle Flexes the knee |
| Soleus | Origins: Superior posterior 3rd of the fibular shaft Soleal line of the tibia Insertion: Calcaneus via the Achilles tendon Action: Plantar flexes the ankle |
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