O and I Quiz #5 -gracilis to pectineus

• Origin: Inferior pubic ramus

• Insertion:

  1. Anteromedial aspect of superior tibia

  2. Contributes to pes anserinus

• Action:

  1. Hip adduction

  2. Knee flexion

  3. Knee internal rotation

• Innervation: Obturator

Muscle: Gracilis

• Origin: Body of pubis

• Insertion: Medial lip of linea aspera (mid femur)

• Action:

  1. Hip adduction

  2. Numerous other movements based on leg position

  3. Whole group functions to stabilize femur

• Innervation: Obturator

Muscle: Adductor longus

• Origin: Inferior pubic ramus

• Insertion: Superior 1/3 of medial lip of linea aspera

• Action: Hip adduction

• Innervation: Obturator

Muscle: Adductor brevis

• Origin:

  1. Anterior fibers: Inferior pubic ramus

  2. Posterior fibers: Ischial tuberosity

  3. Oblique fibers: Ischial ramus

• Insertion:

  1. Medial lip of linea aspera

  2. Adductor tubercle

• Action: Hip adduction, stabilization of femur

• Innervation:

  1. Anterior fibers: Obturator

  2. Posterior fibers: Tibial

Muscle: Adductor magnus

• Origin: Pectineal line of pubis

• Insertion: Pectineal line of femur

• Action:

  1. Hip adduction

  2. Hip flexion

  3. Numerous other movements similar to other adductors

• Innervation:

  1. Femoral

  2. Accessory obturator

Muscle: Pectineus