Extremities Part 2 (Lower Muscles) Flashcards
Unit 4: Extremities
List the four compartments of the thigh.
Anterior
Lateral
Posterior
Medial
What structure forms the compartments of the thigh?
Fascia lata - the deep fascia
List all of the muscles of the lateral compartment of the thigh that cross the knee joint.
Tensor fasciae latae
Identify: Tensor fasciae latae
LATERAL COMPARTMENT
Origin: anterolateral ilium
Insertion: lateral tibial condyle -through iliotibial tract
Action: Abducts thigh
Identify: Sartorius
ANTERIOR COMPARTMENT
Origin: Anterior superior iliac spine
Insertion: medial proximal tibia
Action: flex hip, knee
What is the collective name of the group of four extensors of the knee in the anterior compartment of the thigh?
Quadriceps femoris
What is the common insertion of the group of four extensors of the knee in the anterior compartment of the thigh?
Tibial tuberosity via the patellar tendon
What is the common action of the group of four extensors of the knee in the anterior compartment of the thigh?
Extension of the knee
Of the four extensors in the anterior compartment of the thigh, which crosses the hip joint and is a flexor of the hip?
Rectus femoris
Identify: Rectus femoris
ANTERIOR COMPARTMENT
Origin: anterior inferior iliac spine
Insertion: tibial tuberosity
Action: flexes hip
Identify: Vastus lateralis
ANTERIOR COMPARTMENT
Origin: greater trochanter and linea aspera of femur
Insertion: Tibial tuberosity
Action: extends knee
Identify: Vastus Medialis
ANTERIOR COMPARTMENT
Origin: medial surface and linea aspera of femur
Insertion: tibial tuberosity
Action: extends knee
Identify: Vastus intermedius
ANTERIOR COMPARTMENT
Origin: anterior femur
Insertion: tibial tuberosity
Action: extends knee
List all of the muscles of the anterior compartment of the thigh that cross the knee joint.
Sartorius
Rectus femoris
Vastus lateralis
Vastus intermedius
Vastus medialis
Identify: Gracilis
MEDIAL COMPARTMENT
Origin: body of pubis
Insertion: proximal medial tibia
Action: adducts thigh
Pes Anserinus:
Semitendinosus tendon
gracilis tendon
sartorius tendon
Identify: Pectineus
MEDIAL COMPARTMENT
Origin: pectineal line of pubis
Insertion: pectineal line of femur
Action: adducts thigh, laterally rotates thigh
Identify: Adductor longus
MEDIAL COMPARTMENT
Origin: superior pubic ramus
Insertion: Middle 1/3 linea aspera
Action: Adducts thigh
Identify: Adductor brevis
MEDIAL COMPARTMENT
Origin: inferior pubic ramus
Insertion: proximal linea aspera
Action: adducts thigh
Identify: Adductor magnus
MEDIAL COMPARTMENT
Origin: inferior surface of ischium
Insertion: linea aspera
Action: adducts thigh
List all of the muscles of the medial compartment of the thigh that cross the knee joint.
Gracilis
Identify: Biceps femoris
POSTERIOR COMPARTMENT
Origin: long head - ischial tuberosity
short head - linea aspera
Insertion: head of fibula
Action: flexes leg
Identify: Semimembranosus
POSTERIOR COMPARTMENT
Origin: Ischial tuberosity
Insertion: Posterior medial condyle tibia
Action: flexes knee
Identify: Semitendinosus
POSTERIOR COMPARTMENT
Origin: Ischial tuberosity
Insertion: Medial proximal tibia
Action: flexes knee
List all of the muscles of the posterior compartment of the thigh that cross the knee joint.
Biceps femoris
- long head and short head
Semitendinosus
Semimembranosus
Identify: Popliteus
Origin: lateral condyle of femur
Insertion: Posterior medial tibia
Action: unlocks knee
What is the anatomical term for the muscles of the leg?
Crural muscles
How many compartments lie within the leg?
Three
List the compartments that lie within the leg.
Anterior
Lateral
Posterior
Identify: Extensor digitorum longus
ANTERIOR COMPARTMENT
Origin: Lateral condyle of tibia
Insertion: digits 2-5
Action: dorsiflexion and extends digits 2-5
Identify: Extensor Hallucis Longus
ANTERIOR COMPARTMENT
origin: middle anterior surface fibula
insertion: 1st digit
Action: extends digit 1 assists dorsiflexion of foot
Identify: Tibialis anterior
ANTERIOR COMPARTMENT
Origin: lateral condyle tibia
insertion: medial cuneiform
Action: dorsiflexion of ankle, inversion of foot
Identify: Fibularis longus
LATERAL COMPARTMENT
Origin: superior fibula
Insertion: inferior medial cuneiform
Action: plantar flexion and eversion of foot
Identify: Fibularis brevis
LATERAL COMPARTMENT
Origin: inferior fibula
Insertion: tuberosity of the 5th metatarsal
Action: everts foot
Identify: Gastrocnemius
POSTERIOR COMPARTMENT
Origin: medial head - medial condyle femur
lateral head- lateral condyle femur
Insertion: achilles tendon
Action: plantar flexion foot, knee flexion
Identify: Soleus
POSTERIOR COMPARTMENT
Origin: soleal line
Insertion: achilles tendon
Action: Plantar flexion foot
Identify: Plantaris (The Freshman Nerve)
POSTERIOR COMPARTMENT
Origin: lateral supracondylar ridge femur
Insertion: Achilles tendon
Action: plantar flexion foot and flexing knee joint
Identify: Tibialis posterior
origin: posterior tibia
Insertion: inferior navicular
Action: plantar flexion and inverts foot
Identify: Flexor Digitorum longus
Origin: posterior tibia
Insertion: digits 2-5
Action: flex digits 2-5
Identify: Flexor Hallucis longus
Origin: inferior 1/2 fibula
Insertion: 1st digit
Action: flexes 1st digit
