A & P Quiz 12 (Muscular)
Where does the vastus intermedius originate?
Anterior and lateral surfaces of the femur
Where does the peroneus tertius originate?
Anterior surface of the tibia
What muscle inserts at the head of the fibula and the lateral condyle of the femur?
Biceps femoris
What muscle originates at the ischial tuberosity and linea aspera?
Biceps femoris
What three muscles make up the hamstrings?
Biceps femoris, semitendinosus, semimembranosus
What innervates the extensor digitorum longus?
Deep peroneal nerve
What innervates the peroneus tertius?
Deep peroneal nerve
What innervates the tibialis anterior?
Deep peroneal nerve
Describe the soleus
Deep to the gastrocnemius
Where does the flexor digitorum longus insert?
Distal phalanges of the four lateral toes
Where does the extensor digitorum longus insert?
Dorsal surface of 2nd and 3rd phalanges of the four lateral toes
Where does the peroneus tertius insert?
Dorsal surface of the 5th metatarsal
What is the function of the tibialis anterior?
Dorsiflexion
What is the function of the extensor digitorum longus?
Dorsiflexion and eversion of the foot
What is the function of the peroneus tertius?
Dorsiflexion and eversion of the foot
What is the function of the quadriceps femoris group?
Extends the leg at the knee
What is the function of the rectus femoris?
Extends the leg at the knee
What is the function of the vastus intermedius?
Extends the leg at the knee
What is the function of the vastus lateralis?
Extends the leg at the knee
What is the function of the vastus medialis?
Extends the leg at the knee
What is the function of the biceps femoris?
Extends the thigh and flexes the leg at the knee
What is the function of the semimembranosus?
Extends the thigh and flexes the leg at the knee
What is the function of the semitendinosus?
Extends the thigh and flexes the leg at the knee
Which muscle inserts at the dorsal surface of the 2nd and 3rd phalanges of the four lateral toes?
Extensor digitorum longus
What nerve supplies the vastus intermedius?
Femoral
What innervates the quadriceps femoris muscles?
Femoral nerve
What nerve supplies the rectus femoris?
Femoral nerve
What nerve supplies the vastus lateralis?
Femoral nerve
What nerve supplies the vastus medialis?
Femoral nerve
Describe the tibialis posterior
Flat muscle deep to the soleus
What muscle is responsible for plantar flexion and flexion of the four lateral toes?
Flexor digitorum longus
Which muscle inserts at the distal phalanges of the four lateral toes?
Flexor digitorum longus
Which muscle originates at the posterior surface of the tibia?
Flexor digitorum longus
What muscle group extends the thigh and flexes the leg at the knee?
Flexors of the leg (hamstrings)
Describe the extensor digitorum longus (of the leg)
Forms the anterolateral surface of the leg
Describe the vastus medialis
Forms the inferomedial aspect of the thigh
Describe the vastus lateralis
Forms the lateral aspect of the thigh
What muscles originates at the lateral and medial condyles of the femur?
Gastrocnemius
What muscles insert at the posterior surface of the calcaneus?
Gastrocnemius and soleus
What muscles are plantar flexors?
Gastrocnemius, soleus, flexor digitorum longus
Where does the vastus lateralis originate?
Greater trochanter of the femur
Where does the soles originate?
Head and shaft of the fibula and posterior surface of the tibia
Where does the biceps femoris insert?
Head of the fibula and the lateral condyle of the femur
Where does the semimembranosus originate?
Ischial tuberosity
Where does the semitendinosus originate?
Ischial tuberosity
Where does the biceps femoris originate?
Ischial tuberosity and linea aspera
Describe the biceps femoris
It's the most lateral muscle of the group and arises from two heads
Where does the gastrocnemius originate?
Lateral and medial condyles of the femur
Where does the tibialis posterior originate?
Lateral condyle and posterior surface of the tibia
Where does the extensor digitorum longus originate?
Lateral condyle of the tibia
Where does the tibialis anterior originate?
Lateral condyle of the tibia
Where does the peroneus longus originate?
Lateral condyle of the tibia and the head of the fibula
Describe the vastus intermedius
Lies between the vastus lateralis and the vastus medialis
Describe the semimembranosus
Lies deep to the semitendinosus
Describe the semitendinosus
Lies medial to the biceps femoris
Where does the vastus medialis originate?
Linea aspera
Describe the flexor digitorum longus
Long, narrow muscle that runs parallel to the tibialis posterior
Where does the semimembranosus insert?
Medial condyle of the tibia
Where does the tibialis anterior insert?
Medial cuneiform
Where does the semitendinosus insert?
Medial surface of the tibia
Which muscle is responsible for plantar flexion and eversion of the foot?
Peroneus longus
Which muscle originates at the lateral condyle of the tibia and the head of the fibula?
Peroneus longus
What muscle inserts at the dorsal surface of the 5th metatarsal?
Peroneus tertius
What muscle originates at the anterior surface of the tibia?
Peroneus tertius
What muscles are responsible for dorsiflexion and eversion of the foot?
Peroneus tertius and extensor digitorum longus
What is the function of the peroneus longus?
Plantar flexion and eversion of the foot
What is the function of the flexor digitorum longus?
Plantar flexion and flexion of the four lateral toes
What is the function of the tibialis posterior?
Plantar flexion and inversion of the foot
What is the function of the gastrocnemius?
Plantar flexion of the foot
What is the function of the soleus?
Plantar flexion of the foot
Where does the soleus insert?
Posterior surface of the calcaneus
Where does the gastrocnemius insert?
Posterior surface of the calcaneus (achilles tendon)
Where does the flexor digitorum longus originate?
Posterior surface of the tibia
What muscle originates at the spine of the ilium?
Rectus femoris
What are the four muscles of the quadriceps femoris group?
Rectus femoris, vastus lateralis, vastus medialis, vastus intermedius
What nerve supplies the biceps femoris?
Sciatic
What nerve supplies the semimembranosus?
Sciatic
What nerve supplies the semitendinosus?
Sciatic
All of the hamstrings are innervated by what?
Sciatic nerve
What muscle inserts at the medial condyle of the tibia?
Semimembranosus
What muscle inserts at the medial surface of the tibia?
Semitendinosus
What muscle(s) originate at the ischial tuberosity?
Semitendinosus and semimembranosuss
Describe the peroneus tertius
Small muscle that fuses with the extensor digitorum longus
Which muscle originates at the head and shaft of the fibula and the posterior surface of the tibia?
Soleus
Where does the rectus femoris originate?
Spine of the ilium
Describe the peroneus longus
Superficial lateral muscle that overlies the fibula
What is the gastrocnemius?
Superficial muscle in the calf
Describe the tibialis anterior
Superficial muscle of the anterior leg
Describe the rectus femoris
Superficial muscle of the anterior thigh
What innervates the peroneus longus?
Superficial peroneal nerve
Where does the peroneus longus insert?
Tarsal and metatarsal bones
Where does the tibialis posterior insert?
Tarsal and metatarsal bones
What innervates the flexor digitorum longus?
Tibial nerve
What innervates the gastrocnemius?
Tibial nerve
What innervates the soleus?
Tibial nerve
What innervates the tibialis posterior?
Tibial nerve
Where do all of the quadriceps femoris muscles insert?
Tibial tuberosity (via the patellar tendon)
Where does the rectus femoris insert?
Tibial tuberosity via patellar tendon
Where does the vastus intermedius insert?
Tibial tuberosity via patellar tendon
Where does the vastus lateralis insert?
Tibial tuberosity via patellar tendon
Where does the vastus medialis insert?
Tibial tuberosity via patellar tendon
What muscle inserts at the medial cuneiform?
Tibialis anterior
What muscle is responsible for dorsiflexion?
Tibialis anterior
What muscle(s) originate at the lateral condyle of the tibia?
Tibialis anterior and extensor digitorum longus (of the leg)
What are the three dorsal flexors?
Tibialis anterior, peroneus tertius, extenso digitorum longus
What muscle originates at the lateral condyle and posterior surface of the tibia?
Tibialis posterior
Which muscle is responsible for plantar flexion and inversion of the foot?
Tibialis posterior
Which muscles insert at the tarsal and metatarsal bones?
Tibialis posterior and peroneus longus
What muscle originates at the anterior and lateral surfaces of the femur?
Vastus intermedius
What muscle originates at the greater trochanter of the femur?
Vastus lateralis
What muscle originates at the linea aspera?
Vastus medialis
