iliopsoas (psoas major & iliacus) action –flexion at hip –flexion at lumbar intervertebral...
TRANSCRIPT
Iliopsoas (Psoas major & Iliacus)
• Action– flexion at hip– flexion at lumbar intervertebral joints (psoas
major only)
Gluteus Maximus
• Largest
• Actions– Extends and laterally rotates at hip joint
Gluteus Medius
• 2nd Largest
• Actions– Abduction and medial rotation at hip joint
Gluteus Minimus
• Smallest
• Actions– abducts and medially rotates
• SAME AS MEDIUS
Tensor Fasciae Latae (iliotibial or IT band)
• Action– flexion and medial rotation at hip– lateral support of knee
Piriformis
• Origin– sacrum
• Insertion– femur (greater Trochanter)
• Action– lateral rotation and abduction at hip joint
Quadratus Femoris
• Action– lateral rotation at the hip joint
Adductor Magnus
• Origin– pubis & ischium
• Insertion– femur (linea aspera)
• Action– altogether: adduction at hip joint– superior portion: flexion and medial rotation at hip– inferior part: extension and lateral rotation at hip
Adductor Longus
• Origin– pubis
• Insertion– femur (linea aspera)
• Action – adduction, flexion, and medial rotation at hip
• same for adductor brevis
Adductor Brevis
• Origin– pubis
• Insertion– femur (linea aspera)
• Action– adduction, flexion, and medial rotation at hip
• same for adductor longus
Pectineus
• Origin– Pubis
• Insertion– Femur
• Action– adducts, flexes, and medially rotates at hip
Gracilis
• Origin– pubis
• Insertion– tibia
• Action– flexes at knee, adducts and medially rotates
at hip
Rectus Femoris
• Origin– anterior inferior iliac spine
• Insertion– tibial tuberosity via patellar ligament
• Action– extends at knee, flexes at hip
• part of quadriceps femoris muscle group of anterior thigh
Vastus Lateralis
• Origin– femur
• Insertion– tibial tuberosity via patellar ligament
• Action– extension at knee joint
• part of quadriceps femoris muscle group of anterior thigh
Vastus Medialis
• Origin– Femur
• Insertion– tibial tuberosity via patellar ligament
• Action– extension at knee joint
• part of quadriceps femoris muscle group of anterior thigh
Vastus Intermedius
• Origin– femur
• Insertion– tibial tuberosity via patellar ligament
• Action– extension at knee joint
• part of quadriceps femoris muscle group of anterior thigh
Sartorius
• Origin– Anterior superior iliac spine
• Insertion– tibia
• Action– flexion at knee– flexion and lateral rotation at hip
Biceps Femoris
• Origins– Long Head: ischial tuberosity – Short Head: femur
• Insertion– Long Head: tibia– Short Head: head of fibula
• Action– flexes knee, extends and laterally rotates hip
• Part of Hamstring Muscle group (posterior thigh)
Semimembranosus
• Origin– ischial tuberosity
• Insertion– medial tibia
• Action– flexion at knee, extension and medial rotation
at hip
• Part of Hamstring Muscle group (posterior thigh)
Semitendinosus
• Origin– Ischial Tuberosity
• Insertion– medial tibia
• Action– flexion at knee, extension and medial rotation
at hip
• Part of Hamstring Muscle group (posterior thigh)
Tibialis Anterior
• Action– dorsiflexion (flexion at ankle)– inversion of foot
Peroneals
• peroneus (fibularis) longus• peroneus (fibularis) brevis
• Actions– eversion of foot and plantar flexion (extension
at ankle)
Gastrocnemius
• Origin– femur
• Insertion– calcaneus via achille’s tendon
• Action– plantar flexion (extension at ankle), inversion
of foot, flexion of knee
Soleus
• Origin– fibula & tibia
• Insertion– calcaneus via achille’s tendon
• Action– plantar flexion (extension of ankle)
Popliteus
• Action– medial rotation of tibia (or lateral rotation of
femur)– flexion at knee
Extensor Digitorum Longus
• Action– flexion at joints of toes 2-5
Extensor Hallucis Longus
• Action– Flexion at great toe