Chapter 7B (The Leg)

Question 1

(Organization of the Leg)
The _____ compartment of the leg (dorsiflexor/extensor compartment) is located anterior to the ____ ____ between the lateral surface of the tibia and medial surface of the fibula.

Answer 1

anterior; interosseous membrane

Question 2

(Organization of the Leg)

Most susceptible to _____ ____

Answer 2

compartment syndrome

Question 3

(Organization of the Leg)
Inferiorly, the ____ and ____ ____ ____ bind the tendons of the anterior compartment muscles before and after they cross the ankle joint.

Answer 3

superior and inferior extensor retinacula

Question 4

Muscles of the anterior compartment are innervated by the _____ _____ _____.

Answer 4

deep fibular nerve

Question 5

Muscles of the anterior compartment:

Answer 5

• Tibialis anterior
• Extensor digitorum longus
• Extensor halluces longus
• Fibularis tertius

Question 6

(Organization of the Leg)

The ______ compartment of the leg is the smallest of the leg compartments

Answer 6

lateral compartment (evertor compartment)

Question 7

(Organization of the Leg)
The lateral compartment ends inferiorly at the _____ ____ ____, where the two muscles of the compartment enter a common synovial sheath for passage between the retinaculum and lateral malleolus.

Answer 7

superior fibular retinaculum

Question 8

Muscles of the lateral compartment are innervated by the ____ ____ ____

Answer 8

superficial fibular nerve

Question 9

Muscles of lateral compartment:

Answer 9

• Fibularis longus

- Fibularis brevis

Question 10

(Organization of the Leg)

The _____ compartment of the leg is the largest of the leg compartments.

Answer 10

Posterior compartment (plantarflexor compartment)

Question 11

(Organization of the Leg)

The posterior compartment is divided into the _____ ___ ____ ____ separated by the _____ _____ ____.

Answer 11

superficial and deep subcompartments; transverse intermuscular septum

Question 12

(Organization of the Leg)

Inferiorly, the ___ ____ will support the tendons of the deep subcompartment.

Answer 12

flexor retinaculum

Question 13

The superficial muscles of the posterior compartment are innervated by the ____ ____.

Answer 13

tibial nerve

Question 14

Superficial muscles of the posterior compartment

Answer 14

• Gastrocnemius
• Soleus
• Plantaris

Question 15

The deep muscles of the posterior compartment are innervated by the ____ ____

Answer 15

tibal nerve

Question 16

Deep muscles of the posterior compartment:

Answer 16

• Popliteus
• Flexor halluces longus
• Flexor digitorum longus
• Tibialis posterior

Question 17

(Tibialis Anterior Strain)

Commonly referred to as ____ ___, considered a mild form of the anterior compartment syndrome.

Answer 17

shin splints

Question 18

(Tibialis Anterior Strain)

Characterized by ____ and ____ in the region of the distal 2/3 of the tibia.

Answer 18

edema and pain

Question 19

(Tibialis Anterior Strain)

Results from ____ ____ of the tibialis anterior, causing small tears in the periosteum covering the shaft of the tibia.

Answer 19

repetative microtrauma

Question 20

(Footdrop)

Caused by injury to the ____ ____ _____.

Answer 20

common fibular nerve

Question 21

(Footdrop)

The common fibular nerve is the _____ ____ ____ in the lower limb and vulnerable to direct trauma.

Answer 21

most injured nerve

Question 22

(Footdrop)

May be severed due to a fracture of the ____ ____ or _____ _____ when the knee joint is injured or dislocated.

Answer 22

fibular neck; severely stretched

Question 23

(Footdrop)
Severance of the common fibular nerve results in _____ ____ of all muscles in the anterior and lateral compartments of the leg (dorsiflexors of ankle and evertors of foot)

Answer 23

flaccid paralysis

Question 24

(Footdrop)

Loss of _____ of the ankle will result in foot drop and further exacerbated by unopposed inversion of the foot.

Answer 24

dorsiflexion

Question 25

(Footdrop)

What does it result in?

Answer 25

• May result in making the limb “too long” to clear the ground during the swing phase of walking
• Means of compensation may include using a waddled, swing-out, or steppage gait.

Question 26

(Rupture of the Calcaneal Tendon)

Also known as…

Answer 26

Achilles tendon

Question 27

(Rupture of the Calcaneal Tendon)

Rupture of the calcaneal tendon is often sustained by ____ ____ ___ with a history of ____ ____.

Answer 27

poorly conditioned people; calcaneal tendinitis

Question 28

(Rupture of the Calcaneal Tendon)

The muscles affected include the _____, _____, and _____.

Answer 28

gastrocnemius, soleus, and plantaris

Question 29

(Rupture of the Calcaneal Tendon)

Individuals with this injury cannot…

Answer 29

plantarflex against resistance and passive dorsiflexion is excessive

Question 30

(Rupture of the Calcaneal Tendon)

Ambulation is possible only when …

Answer 30

the limb is externally rotated