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Inner Pelvic Muscles - Horse Anatomy (view source)
Revision as of 17:45, 15 October 2012
, 17:45, 15 October 2012Created 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''''..."
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
'''''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