Lower Muscles

Serratus Anterior

Rectus abdominus

Internal obliques

External Obliques

Rectus Femoris

- Origin: A.I.I.S (Anterior superior illiac spine)
- Insertion: Common patella tendon at the tibial tuberosity
- Action: Knee extension and Hip flexion

Vastus Lateralis
- Origin: Linea Aspera (lateral) + Greater trochanter
- Insertion: Common patella tendon at the tibial tuberosity

- Action: Knee extension

Vastus Medialis
- Origin: Linea Aspera (mediall)

-Inesrtion: Common patella tendon at the tibial tuberosity
-Action: Knee Extension

Vastus Intermedialis

Tensor Fascia Latae

Sartorius
- Origin: A.S.I.S
-Insertion: Medial surface of tibia (proximal)
-Action: Hip flexion, and hip outward rotation

Semitendinosus
-Origin: Ischial tuberosity

-Insertion:Medial condyle of the tibia

Semimembranosus
-Origin:Ischial tuberosity
-Insertion: Medial condyle of the tibia (posterior)
-Action: Flexion and internal rotation of the knee

Biceps femoris
-Origin: Ischial tuberosity + linea aspera
-Insertion: Head of Fibula

Psoas Major
-Origin: L1 - L5
-Insertion: Lesser Tronchanter
-Action: Hip and Trunk flexion

Adductor Longus

Adductor Magnus

Adductor Brevis

Pectineus
-Origin: Superior Ramus of teh pubis
-Insertion: Lesser Trochanter to linea aspera
-Action: Hip flexion and Hip Abduction

Gluteus Maximus

Gluteus Medius

Gluteus Minimus
-Origin: Lateral Surface of the Ilium
-Insertion: Greater Trochanter(posterior surface)

-Action: Abduction and internal rotation of thisgh

Piriformis

Gastrocnemius

Soleus

Fibularis Longus
-Origin: Proximal two thirds of the Fibula
-Insertion: First Metacarpal

-Action: Plantar flexion and eversion of the foot

Fibularis Brevis
-Origin: Distal two thirds of the fibula
-Insertion: Lateral cuneifom of 5th metacarpal
-Action: Plantar flexion and eversion of the foor