The Leg - Anterior Compartment Flashcards Preview

SCT1 Anatomy Midterm Exam > The Leg - Anterior Compartment > Flashcards

Flashcards in The Leg - Anterior Compartment Deck (23)
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1
Q

(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

A

TIBIALIS ANTERIOR

2
Q

(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

A

EXTENSOR HALLUCIS LONGUS

EHL

3
Q

(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

A

EXTENSOR DIGITORUM LONGUS

EDL

4
Q

(O) Superior/proximal attachment:
ANTERIOR DISTAL FIBULA

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

Actions:
DORSIFLEXION
EVERSION

A

PERONEUS TERTIUS

5
Q

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

A

DORSIFLEXION

6
Q

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

A

EVERSION

7
Q

Tibialis anterior is responsible for which movement of the foot?

A

INVERSION

8
Q

Extensor hallucis longus is responsible for which two actions?

A

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

9
Q

Extensor digitorum longus is responsible for which three actions?

A
EXTENSION OF 2ND-5TH TOES (MTPS, PIPs, DIPs)
\+
DORSIFLEXION
\+
EVERSION
10
Q

Peroneus tertius is responsible for which two actions?

A

DORSIFLEXION
+
EVERSION

11
Q

Tibialis anterior is responsible for which two actions?

A

DORSIFLEXION
+
INVERSION

12
Q

Where does tibialis anterior attach superiorly and proximally?

A

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

13
Q

Where does tibialis anterior attach inferiorly and distally?

A

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

14
Q

Where does EHL attach superiorly and proximally?

A

ANTERIOR MIDDLE FIBULA AND INTEROSSEOUS MEMBRANE

15
Q

Where does EHL attach inferiorly and distally?

A

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

16
Q

Where does EDL attach superiorly and proximally?

A

PROXIMAL 3/4 OF ANTERIOR FIBULA, INTEROSSEOUS MEMBRANE

17
Q

Where does EDL attach inferiorly and distally?

A

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

18
Q

Where does peroneus tertius attach superiorly and proximally?

A

ANTERIOR DISTAL FIBULA

19
Q

Where does peroneus tertius attach inferiorly and distally?

A

BASE OFTHE 5TH MT (DORSAL SURFACE)

20
Q

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

A
TIBIALIS ANTERIOR
\+
EXTENSOR HALLUCIS LONGUS
\+
EXTENSOR DIGITORUM LONGUS
21
Q

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

A

SUPERIOR EXTENSOR RETINACULUM
+
INFERIOR EXTENSOR RETINACULUM

22
Q

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

A

TENDON SHEATH SURROUNDING TENDON

23
Q

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

A

EXTENSOR HALLUCIS LONGUS

EHL