The Leg - Anterior Compartment

Question 1

(O) Superior/proximal attachment:
ANTERIOR, LATERAL, SUPERIOR 1/2 OF THE TIBIA, INTEROSSEOUS MEMBRANE

(I) Inferior/distal attachment:
BASE OF THE 1ST MT, 1ST (MEDIAL) CUNEIFORM

Actions:
DORSIFLEXION
INVERSION

Answer 1

TIBIALIS ANTERIOR

Question 2

(O) Superior/proximal attachment:
ANTERIOR MIDDLE FIBULA AND INTEROSSEOUS MEMBRANE

(I) Inferior/distal attachment:
BASE OF THE DISTAL PHALANX OF THE 1ST TOE (DORSAL SURFACE)

Actions:
EXTENSION OF 1ST TOE (MTP, IP)
ASSISTS IN DORSIFLEXION

Answer 2

EXTENSOR HALLUCIS LONGUS

EHL

Question 3

(O) Superior/proximal attachment:
PROXIMAL 3/4 OF ANTERIOR FIBULA, INTEROSSEOUS MEMBRANE

(I) Inferior/distal attachment:
MIDDLE AND DISTAL PHALANGES OF LATERAL 4 TOES (DORSAL SURFACE)

Actions:
EXTENSION OF 2ND-5TH TOES (MTPS, PIPs, DIPs)
DORSIFLEXION
EVERSION

Answer 3

EXTENSOR DIGITORUM LONGUS

EDL

Question 4

(O) Superior/proximal attachment:
ANTERIOR DISTAL FIBULA

(I) Inferior/distal attachment:
BASE OFTHE 5TH MT (DORSAL SURFACE)

Actions:
DORSIFLEXION
EVERSION

Answer 4

PERONEUS TERTIUS

Question 5

The muscles of the anterior compartment of the leg are mainly responsible for?

Answer 5

DORSIFLEXION

Question 6

The more lateral extensor digitorum longus and peroneus tertius are responsible for which action in the foot?

Answer 6

EVERSION

Question 7

Tibialis anterior is responsible for which movement of the foot?

Answer 7

INVERSION

Question 8

Extensor hallucis longus is responsible for which two actions?

Answer 8

EXTENSION OF 1ST TOE (MTP, IP)
+
ASSISTS IN DORSIFLEXION

Question 9

Extensor digitorum longus is responsible for which three actions?

Answer 9

EXTENSION OF 2ND-5TH TOES (MTPS, PIPs, DIPs)
\+
DORSIFLEXION
\+
EVERSION

Question 10

Peroneus tertius is responsible for which two actions?

Answer 10

DORSIFLEXION
+
EVERSION

Question 11

Tibialis anterior is responsible for which two actions?

Answer 11

DORSIFLEXION
+
INVERSION

Question 12

Where does tibialis anterior attach superiorly and proximally?

Answer 12

ANTERIOR, LATERAL, SUPERIOR 1/2 OF THE TIBIA, INTEROSSEOUS MEMBRANE

Question 13

Where does tibialis anterior attach inferiorly and distally?

Answer 13

BASE OF THE 1ST MT, 1ST (MEDIAL) CUNEIFORM

Question 14

Where does EHL attach superiorly and proximally?

Answer 14

ANTERIOR MIDDLE FIBULA AND INTEROSSEOUS MEMBRANE

Question 15

Where does EHL attach inferiorly and distally?

Answer 15

BASE OF THE DISTAL PHALANX OF THE 1ST TOE (DORSAL SURFACE)

Question 16

Where does EDL attach superiorly and proximally?

Answer 16

PROXIMAL 3/4 OF ANTERIOR FIBULA, INTEROSSEOUS MEMBRANE

Question 17

Where does EDL attach inferiorly and distally?

Answer 17

MIDDLE AND DISTAL PHALANGES OF LATERAL 4 TOES (DORSAL SURFACE)

Question 18

Where does peroneus tertius attach superiorly and proximally?

Answer 18

ANTERIOR DISTAL FIBULA

Question 19

Where does peroneus tertius attach inferiorly and distally?

Answer 19

BASE OFTHE 5TH MT (DORSAL SURFACE)

Question 20

What is the order of tendon palpation of the anterior leg compartment from medial to lateral?

Answer 20

TIBIALIS ANTERIOR
\+
EXTENSOR HALLUCIS LONGUS
\+
EXTENSOR DIGITORUM LONGUS

Question 21

Name the two retinacula which prevent the tendons from bowing when the muscles contract?

Answer 21

SUPERIOR EXTENSOR RETINACULUM
+
INFERIOR EXTENSOR RETINACULUM

Question 22

What is found between the tendons and retinacula where there is a possibility of friction between the tendons?

Answer 22

TENDON SHEATH SURROUNDING TENDON

Question 23

Name the deepest muscle of the anterior compartment of the leg?

Answer 23

EXTENSOR HALLUCIS LONGUS

EHL