Anterior and Medial Compartments of the thigh Flashcards Preview

Anatomy > Anterior and Medial Compartments of the thigh > Flashcards

Flashcards in Anterior and Medial Compartments of the thigh Deck (25):
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Thigh compartments innervation

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Transverse Section through thigh 

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Femur 

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List muscle groups

 

• Groups:

–  Tensor fascia latae

–  Hip flexors (2)

–  Anterior compartment of thigh (4)

–  Medial compartment of thigh (6)

–  Posterior compartment of thigh (3)

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TFL O,A,I,Inn

• Tensor fascia lata – Origin

» Iliac crest btwn ASIS & tubercle

– Insertion
» Iliotibial tract

– Innervation

» Superior Gluteal Nerve (L4, L5, S1)

– Action
» stabilises knee in extension

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Iliotibial Tract 

• Has Insertion Of 3/4 Of Gluteus Maximus & Tensor Fascia Latae

• Inserts Into Lateral Condyle Of Tibia • It Maintains Extension Of The Knee

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Iliacus

• Origin:
– Iliac fossa

• Insertion:
– Lesser trochanter of femur

• Innervation:
– Femoral nerve (L2, L3)

• Action:

–  Hip flexion (prime mover)

–  Together: trunk flexion

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Psoas Major 

Origin:

–  L1-L5 transverse processes

–  T12-L5 bodies & IVDs

Insertion:

– Lesser trochanter of femur

• Innervation:
– L1-L3 ventral rami

• Action:
– Hip flexion

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Rectus Femoris 

• Origin

–  Straight head: AIIS

–  Reflected head: ilium superior to acetabulum

• Insertion

– Quadriceps femoris tendon

• Innervation
– Femoral nerve (L2, L3, L4)

• Action

–  Flexion of thigh at hip

–  Extension of leg at knee

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Vastus Lateralis 

• Origin

– Femur: greater troch & lateral intertrochanteric line, gluteal tub, linea aspera

• Insertion
– Quadriceps femoris tendon

• Innervation
– Femoral nerve (L2, L3, L4)

• Action
– Extension of leg at knee

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Vastus Medialis 

• Origin

– Femur: medial intertrochanteric line, spiral line, linea aspera, supracondylar line

• Insertion
– Quadriceps femoris tendon

• Innervation
– Femoral nerve (L2, L3, L4)

• Action
– Extension of leg at knee

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Vastus Intermedius 

• Origin

– Femur: upper 2/3s of anterior & lateral surfaces

• Insertion
– Quadriceps femoris tendon

• Innervation
– Femoral nerve (L2, L3, L4)

• Action
– Extension of leg at knee

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Patella tendon

• Is Formed By The Union Of The Four Aponeuroses/Tendons

• Inserts Into Apex Of Patella By Four Identifiable Areas

• Some Fibres Of Vasti Continue Over Patella & Insert Into Tibia & Fibula, Reinforcing Capsule Of Knee

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Tendency for patella to dislocate laterally

2 mechanisms to stop this 

– Buttress Effect Of The Lateral Femoral Condyle

– Distal Fibres Of Vastus Medialis Extend Further Than Those Of Lateralis

• And Turn Laterally Into The Patella

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Sartorius 

• Classic Strap Muscle

• Proximal Attachment:

–  Anterior Superior Iliac Spine

–  Passes Inferomedially As Lateral Border Of The Femoral Triangle, Becoming The Roof Of The Adductor Canal Covering The Femoral Artery & Vein

• Distal Attachment:
– Anteriomedial Aspect Of Proximal Tibia

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Pectineus 

• Arises:

– From Pectineal Line Of Pubis

– Fibres Pass Inferiorly, Posteriorly And Laterally To Insert Into Pectineal Line Of Femur.

• Nerve Supply:
– Femoral (L2-4) & Sometimes By Branch Of Obturator (L2-4)

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Adductor Longus

• Proximal Attachment
– By Tendon Of Origin From Body Of Pubis

• Distal Attachment
– Middle Third Of Linear Aspera By Aponeurosis

• Nerve Supply
– Anterior Division Of Obturator Nerve (L2-4)

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adductor brevis

• Is Behind Pectineus And A. Longus

• Proximal Attachment

– Narrow Origin On The Body And Inferior Ramus Of Pubis

• Distal Attachment
– By Aponeurosis Into Pectineal Line And Linear Aspera

• Nerve Supply
– Anterior Branch Of Obturator Nerve (L2-4)

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Adductor Magnus 

Large Triangular Muscle

Proximal Attachment:
– Inferior Pubic & Ischial Rami
– Inferior Part Of Ischial Tuberosity

Distal Attachment
– Fibres From Pubic Rami Into Edge Of Gluteal Tuberosity – Fibres From Ischial Rami Into Linear Aspera
– Fibres From Ischial Tuberosity Into Adductor Tubercle

• Nerve Supply

– Adductor Portion:
• Obturator Nerve (L2-4) - Posterior Component

– Hamstring Portion
• Tibial Component Of The Sciatic (L4-S3)

• Special Features

• Four Small Osteo-aponeurotic Perforations For Branches Of Profunda Femoris

• One Large (Lowest) Perforation For The Femoral Artery & Vein

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Gracilis 

Proximal Attachment:
– Body & Inferior Ramus Of Pubis

Distal Attachment
– Uper Medial Aspect Of Tibia (With Semitendinosis & Sartorius)

Nerve Supply:
– Ant. Branch Of Obturator Nerve (L2-4)

• Action
– Adducts Thigh, Flexes & Medially Rotates Leg Plus More*

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Thigh Proximal Section 

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thigh middle section

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Thigh Distal Section 

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