Lab 9 Muscles of the lower limb and hip

A

Iliopsoas

B

Sartorius

C

Rectus femoris

D

Vastus medialis

E

Vastus lateralis

F

Adductor longus

G

Tibialis anterior

H

Extensor digitorum longus

i

Gastrocnemius

J

Soleus

K

Flexor digitorum longus

A

Vastus medialis

B

Sartorius

C

Rectus femoris

D

Adductor longus

E

Gracilis

F

Adductor magnus

G

Gastrocnemius

H

Soleus

i

Flexor digitorum longus

J

Tibialis anterior

A

Vastus intermedius

B

vastus medialis

C

Vastus lateralis

D

Tibialis anterior

E

Extensor digitorum longus

A

Tensor fascia latae

B

vastus medialis

C

vastus lateralis

D

Gluteus maximus

E

Tibialis anterior

F

Extensor digitorum longus

G

Fibularis longus

H

Gastrocnemius

A

Gluteus maximum

B

Biceps Femoris

C

Semitendinosus

D

Gastrocnemius

E

Soleus

A

Gluteus medius

B

Biceps femoris

C

Semitendinosus

D

Vastus lateralis

E

Gastrocnemius

F

Fibularis brevis

G

Semimembranosus

—If the semitendinosus was removed and filpped around the semimembranosus would be on the back of it

—Think of it flattened like a membrane vs a tendon

H

Fibularis longus

i

Soleus

A

Gastrocnemius

B

Soleus

C

Fibularis longus

D

Extensor digitorum longus

E

Tibialis anterior

F

Fibularis brevis

A

Iliotibial tract

an aponurosis

Origin, Insertion, Action of Iliopsosas

• Origin: Iliac fossa

• Insertion: Lesser Trochanter

• Action:

  • Prime mover for flexing thigh

  • flexing trunk on thigh

  • flexes vertebral column laterally

Origin, Insertion, Action of Sartorious

• Origin: Anterior superior iliac spine

• Insertion: medial aspect of proximal tibia

• Action:

  • Flexes Thigh

  • Abducts Thigh

  • Laterally rotates Thigh

Origin, Insertion, Action of Gluteus maximus

• Origin: Sacrum

• Insertion: Gluteal tuberosity

• Action: Major extensor of thigh

Origin, Insertion, Action of gluteus medius

• Origin: Lateral surface of ilium

• Insertion: Greater trochanter of femur

• Action:

  • Abducts thigh

  • Medially rotates thigh

Origin, Insertion, Action of tensor fascia latae

• Origin: iliac crest

• Insertion: iliotibial tract (band from iliac crest to knee)

• Action:

  • Steadies the leg and trunk on thigh by tightening iliotibial tract

Origin, Insertion, Action of rectus femoris

• Origin: Anterior inferior iliac spine

• Insertion: Patella

• Action:

  • Extends leg

  • Flexes thigh at hip

Origin, Insertion, Action of vastus lateralis

• Origin: Greater trochanter

• Insertion: Patella

• Action:

  • Extends leg

  • Stabilizes knee

Origin, Insertion, Action of vastus medialis

• Origin: linea aspera

• Insertion: patella

• Action: extends leg

Origin, Insertion, Action of vastus intermedius

• Origin: Anterior and lateral surfaces of proximal femur shaft

• Insertion: patella

• Action: extends leg

Origin, Insertion, Action of biceps femoris

• Origin: ischial tuberosity

• Insertion: Head of fibula

• Action:

  • Extends thigh

  • Flexes leg

Origin, Insertion, Action of semitendinosus

• Origin: ischial tuberosity

• Insertion: medial aspect of upper tibial shaft

• Action:

  • Extends thigh

  • Flexes leg

Origin, Insertion, Action of semimembranosus

• Origin: Ischial tuberosity

• Insertion: medial condyle of tibia

• Action:

  • Extends thigh

  • flexes leg

Origin, Insertion, Action of adductor longus

• Origin: Pubis near pubic symphysis

• Insertion: linea aspera

• Action:

  • Adducts leg

  • Flexes leg

  • Medially Rotates leg

Origin, Insertion, Action of adductor magnus

• Origin: Ischial tuberosity

• Insertion: linea aspera

• Action:

  • Adducts thigh

  • Medially rotates thigh

  • Flexes thigh

  • Posterior part: Extends thigh

Origin, Insertion, Action of gracilis

• Origin: Body of pubis

• Insertion: Medial surface of tibia

• Action:

  • Adducts thigh

  • Flexes and medially rotates leg

Origin, Insertion, Action of tibialis anterior

• Origin: Lateral condyle of tibia

• Insertion: 1st metatarsal

• Action: prime mover of dorsiflexion

Origin, Insertion, Action of extensor digitorum longus

• Origin: Lateral condyle of tibia

• Insertion: middle and distal phalanges of 2nd-5th toes

• Action: prime mover of toe extension

Origin, Insertion, Action of gastrocnemius

• Origin: Medial and lateral condyles of femur

• Insertion: Posterior calcaneus

• Action: plantar flexes foot

Origin, Insertion, Action of soleus

• Origin: Superior tibia

• Insertion: posterior calcaneus

• Action: plantar flexes foot

Origin, Insertion, Action of flexor digitorum longus

• Origin: Posterior tibia

• Insertion: distal phalanges of 2nd and 5th toes

• Action:

  • plantar flexes and inverts foot

  • Flexes toes

Origin, Insertion, Action of fibularis longus

• Origin: head of fibula

• Insertion: 1st metatarsal

• Action:

  • plantar flexes foot

  • everts foot

Origin, Insertion, Action of fibularis brevis

• Origin: Distal fibula shaft

• Insertion: proximal end of 5th metatarsal

• Action:

  • plantar flexes foot

  • everts foot

Gluteus medius

Gluteus maximus

Differences in the cat and the human

1. Gluteus medius and maximus

   1. In humans the gluteus maximus is larger and completely covers the gluteus medius

   2. in the cat the Gluteus medius is larger

2. Sartorius

   1. much wides in the cat

3. Gracilis

   1. in the cat it is so broad it covers most of the adductors

Sartorius

Tensor fascia latae

A

Gluteus medius

B

Gluteus Maximus

C

sartorius

D

Biceps femoris

A

Biceps femoris

B

Semitendinosus

C

semimembranosus

A

biceps femoris

B

semitendinosis

C

semimembrenosis

What muscles make up the hamstrings?

1. Biceps femoris

2. semitendinosis

3. semimembrenosis

A

Gastrocnemius

B

Soleus

C

Fibularis

D

Extensor digitorium longus

E

Tibialis anterior

A

Tibialis anterior

A

Ilioposas