Muscles of the Leg [email protected].
-
Upload
sophie-scott -
Category
Documents
-
view
221 -
download
3
Transcript of Muscles of the Leg [email protected].
Muscles of the Leg
Gluteus Maximus
Origin • outer surface of iliac
crest• Sacrum• CoccyxInsertion• Iliotibial tract • Posterior femurFunction• Hip extension Gluteus Maximus
Gluteus Medius
Origin • Lateral surface of the
iliumInsertion• Greater trochanter of
the femurFunction• Abducts the hip Gluteus Medius
Tensor Fascia Latae
Origin • Lateral surface of the
iliac crestInsertion• Iliotibial tractFunction• Abducts, flexes and
medially rotates the thigh Tensor Fascia Latae
Gracilis
Origin • Inferior ramus of the
pubisInsertion• Medial surface of the
tibiaFunction• Adduction of the hip• Flexes the leg at the knee
Gracilis
Biceps Femoris
Origin • Ischial Tuberosity• Linea aspera of femurInsertion• Medial surface of the
tibiaFunction• Flexes the leg at the knee• Extends the hip
Biceps Femoris
Semitendinosus
Origin • Ischial tuberosityInsertion• Head of the fibula• Medial tibiaFunction• Flexes knee • Extends the hip
Semitendinosus
Semimembranous
Origin • Ischial tuberosityInsertion• Medial condyle of the
tibiaFunction• Flexes the knee• Extends the hip
Semimembranous
Adductor magnus
Origin • Ischial tuberosity
Insertion• Linea aspera of femur
Function• Adducts and extends hip
Adductor Magnus
Adductor longus
Origin • Inferior ramus of the
pubis
Insertion• Linea aspera of the femur
Function• Adducts and flexes the
hipAdductor Longus
Iliacus
Origin • Iliac fossa
Insertion• Lesser trochanter
Function• Flexes hip
Iliacus
Psoas major
Origin • Transverse process of T12
– L5
Insertion• Lesser trochanter
Function• Flexes hip
Psoas major
Sartorius – the longest muscle in the body
Origin • Anterior Superior Iliac Spine
Insertion• Medial surface of the tibia
Function• Flexes the knee and hip• Laterally rotates the hip• “Crosses Legs” Sartorius
Rectus femoris
Origin • Anterior inferior iliac
spineInsertion• Tibial tuberosity by the
patellar ligamentFunction• Extends knee• Flexes hip
Rectus Femoris
Vastus lateralis
Origin • Greater trochanter of
femurInsertion• Tibial tuberosity by
the patellar ligamentFunction• Extends knee
Vastus lateralis
Vastus medialis
Origin • Medial surface of the
linea aspera of the femurInsertion• Tibial tuberosity by the
patellar ligamentFunction• Extends the knee
Vastus medialis
Vastus intermedius
Origin • Anterior and lateral
surfaces of femurInsertion• Tibial tuberosity by
the patellar ligamentFunction• Extends knee
Vastus intermedius
Gastocnemius
Origin • Medial and lateral
epicondyles of the femurInsertion• Posterior surface of
calcaneus via tendocalcaneus
Function• Plantar flexes the ankle
Gastrocnemius
Soleus
Origin • Head of the fibula• Shaft of the tibiaInsertion• Calcaneus via the
tendocalcaneusFunction• Plantar flexes ankle
Soleus
Tibialis anterior
Origin • Lateral condyle and the
lateral surface of the tibiaInsertion• Base of the 1st metatarsal
and the medial cuneiform
Function• Dorsiflexes ankle and
inverts foot
Tibialis anterior
Extensor digitorum longus
Origin • Lateral condyle of the tibia
and anterior surface of the fibula
Insertion• Toes 2-5
Function• Extends toes 2-5• Dorsiflexes and everts foot
Extensor Digitorum Longus
Peroneus Longus
Origin • Lateral condyle of tibia• Head and shaft of fibulaInsertion• Tarsals and metatarsalsFunction• Everts foot and plantar
flexes ankle
Peroneus Longus
Peroneus Brevis
Origin • Lateral margin of the
fibulaInsertion• Base of the 5th
metatarsalFunction• Everts foot and
plantar flexes anklePeroneus Brevis
Biology 160 Muscles (Need to Know)
Leg Lab 2You will need to know the origins, insertions
and functions for these muscles
• 1,2,4,5,6,7,8,9,11,12,17,18,19,20,21,22,
• Psoas Major and Iliacus