Medial Thigh Muscles

Question 1

Adductor Longus (Origin, Insertion, Innervation, Action)

Answer 1

Origin: Body of pubis, inferior to pubic crest

Insertion: Middle 1/3 of linea aspera

Innervation: Obturator nerve

Action: Adducts thigh

Question 2

Adductor Brevis (Origin, Insertion-2, Innervation, Action)

Answer 2

Origin: Body and inferior ramus of pubis

Insertion:

• Pectineal line
• Proximal part of linea aspera

Innervation: Obturator Nerve

Action: Adducts thigh (also flexes to some extent)

Question 3

Adductor Magnus (Adductor Part) (Origin, Insertion-3, Innervation, Action-2)

Answer 3

Origin: Inferior pubic ramus

Insertion:

• Gluteal tuberosity
• Linea aspera
• Medial supracondylar line

Innervation: Obturator nerve

Action:

• Adducts thigh
• Flexes thigh

Question 4

Adductor Magnus (Hamstring Part) (Origin, Insertion, Innervation, Action-2)

Answer 4

Origin: Ischial tuberosity

Insertion: Adductor tubercle

Innervation: Tibial part of sciatic nerve

Action:

• Adduct thigh
• Extends thigh

Question 5

Gracilis (Origin, Insertion, Innervation, Action-3)

Answer 5

Origin: Body and inferior ramus of pubis

Insertion: Superior part of medial surface of tibia

Innervation: Obturator nerve

Action:

• Adducts thigh
• Flexes leg
• Helps rotate leg medially

Question 6

Obturator externus

Answer 6

Origin: Margins of obturator foramen and obturator membrane

Insertion: Trochanteric fossa of femur

Innervation: Obturator nerve

Action:

• Laterally rotates thigh
• Steadies head of femur in acetabulum