Difference between revisions of "Inner Pelvic Muscles - Horse Anatomy"
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(Created page with "The inner pelvic muscles are small and lie close to the coxofemoral (hip) joint. They run between the pelvis and trochanteric fossa of the femur. '''''Internal Obturator''''...") |
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| − | + | The inner pelvic muscles are small and lie close to the coxofemoral (hip) joint. They run between the pelvis and trochanteric fossa of the femur. | |
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| − | The inner pelvic muscles are small and lie close to the | ||
'''''Internal Obturator''''' | '''''Internal Obturator''''' | ||
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:'''Origin''': | :'''Origin''': | ||
::Pubic head - Cranial and medial borders of the obturator foramen | ::Pubic head - Cranial and medial borders of the obturator foramen | ||
| − | ::Pelvic head - Pelvic symphysis and pelvic aspect of the body of the | + | ::Pelvic head - Pelvic symphysis and pelvic aspect of the body of the ilium |
:'''Insertion''': Trochanteric fossa together with the ''gemellus'' muscle, having passed over the lesser sciatic notch | :'''Insertion''': Trochanteric fossa together with the ''gemellus'' muscle, having passed over the lesser sciatic notch | ||
| − | :'''Action''': Rotates the | + | :'''Action''': Rotates the femur laterally, aids hip extension |
'''''External Obturator''''' | '''''External Obturator''''' | ||
:'''Innervation''': Obturator n. | :'''Innervation''': Obturator n. | ||
| − | :'''Origin''': | + | :'''Origin''': Vental surface of pelvis, close to the obturator foramen |
:'''Insertion''': Trochanteric fossa | :'''Insertion''': Trochanteric fossa | ||
| − | :'''Action''': Supinates the | + | :'''Action''': Supinates the femur and adducts the limb |
'''''Gemellus''''' | '''''Gemellus''''' | ||
: In the horse, these two small muscle bundles are fused and unite partly with the ''internal obturator'' muscle | : In the horse, these two small muscle bundles are fused and unite partly with the ''internal obturator'' muscle | ||
:'''Innervation''': Sciatic n. | :'''Innervation''': Sciatic n. | ||
| − | :'''Origin''': | + | :'''Origin''': Ischium |
:'''Insertion''': Trochanteric fossa | :'''Insertion''': Trochanteric fossa | ||
:'''Action''': Aids lateral rotation of the limb | :'''Action''': Aids lateral rotation of the limb | ||
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Revision as of 17:45, 15 October 2012
The inner pelvic muscles are small and lie close to the coxofemoral (hip) joint. They run between the pelvis and trochanteric fossa of the femur.
Internal Obturator
- In the horse this muscle has two heads, a small and tendinous pubic head and a larger pelvic head.
- Innervation: Sciatic n.
- Origin:
- Pubic head - Cranial and medial borders of the obturator foramen
- Pelvic head - Pelvic symphysis and pelvic aspect of the body of the ilium
- Insertion: Trochanteric fossa together with the gemellus muscle, having passed over the lesser sciatic notch
- Action: Rotates the femur laterally, aids hip extension
External Obturator
- Innervation: Obturator n.
- Origin: Vental surface of pelvis, close to the obturator foramen
- Insertion: Trochanteric fossa
- Action: Supinates the femur and adducts the limb
Gemellus
- In the horse, these two small muscle bundles are fused and unite partly with the internal obturator muscle
- Innervation: Sciatic n.
- Origin: Ischium
- Insertion: Trochanteric fossa
- Action: Aids lateral rotation of the limb