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 [[Joints and Ligaments - Horse Anatomy#Coxafemoral/Hip Joint|coxafemoral (hip) joint]].  They run between the pelvis and trochanteric fossa of the [[Limb Bones and Cartilages - Horse Anatomy#Femur|femur]].
  
 
'''''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
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::Pelvic head - Pelvic symphysis and pelvic aspect of the body of the ilium
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::Pelvic head - Pelvic symphysis and pelvic aspect of the body of the [[Hindlimb - Anatomy & Physiology#Ilium|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
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:'''Action''': Rotates the femur laterally, aids hip extension
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:'''Action''': Rotates the [[Limb Bones and Cartilages - Horse Anatomy#Femur|femur]] laterally, aids [[Joints and Ligaments - Horse Anatomy#Coxafemoral/Hip Joint|hip]] extension
  
 
'''''External Obturator'''''
 
'''''External Obturator'''''
 
:'''Innervation''': Obturator n.
 
:'''Innervation''': Obturator n.
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:'''Origin''': Vental surface of pelvis, close to the obturator foramen
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:'''Origin''': Ventral surface of pelvis, close to the obturator foramen
 
:'''Insertion''': Trochanteric fossa
 
:'''Insertion''': Trochanteric fossa
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:'''Action''': Supinates the femur and adducts the limb
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:'''Action''': Supinates the [[Limb Bones and Cartilages - Horse Anatomy#Femur|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.
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:'''Origin''': Ischium
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:'''Origin''': [[Hindlimb - Anatomy & Physiology#Ischium|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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[[Category:Muscles - Horse Anatomy]]

Latest revision as of 20:13, 9 January 2013


The inner pelvic muscles are small and lie close to the coxafemoral (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: Ventral 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


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