Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

MSK Exam 2 > Anterior & Lateral Leg > Flashcards

Anterior & Lateral Leg Flashcards

1
Q

The Crural Fascia is the deep fascia of the leg and continuous with the _______ _______. It covers the leg muscles and is part of the proximal attachment of underlying muscles. It thickens distally to form the ________ _________.

A

Fascia Lata

Extensor Retinaculum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

This septum separates the anterior leg compartment from the lateral leg compartment.

A

Anterior septum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

This septum separates the lateral leg compartment from the posterior (superficial) leg compartment.

A

Posterior septum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What separates the anterior leg compartment from the posterior (deep) compartment?

A

Interosseous membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the muscles within the anterior leg compartment?

A

Tibialis Anterior M.
Extensor Hallucis Longus M.
Extensor Digitorum Longus M.
Fibularis Tertius M.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the primary function of the anterior leg compartment?

A

Dorsiflexion

Toe extension

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

This is the a long, thick muscle on the anterolateral surface of the Tibia. It attaches proximally to the lateral tibial condyle and distally to the medial side of first cuneiform and first metatarsal.

A

Tibialis Anterior M.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the functions of the Tibialis Anterior M.?

A

Dorsiflexion

Inversion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

The Extensor Digitorum Longus M. attaches proximally to the lateral tibial condyle, anterior fibula, and interosseous membrane. How does it attach distally?

A

Four tendons create extensor expansions over lateral four digits.

Two lateral slips – go to distal phalanx
One central slip – go to middle phalanx

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the functions of the Extensor Digitorum Longus M.?

A

Extends lateral four digits

Dorsiflexion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

This muscle fuses with the Extensor Digitorum Longus M. proximally and its tendon does NOT attach to a digit. Sometimes absent.

A

Fibularis Tertius M.

***DO NOT confuse this muscle with other “fibularis” muscles – those are in lateral compartment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

This muscle attaches proximally to the anteroinferior fibula and distally to the dorsum of the fifth metatarsal.

A

Fibularis Tertius M.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What functions does the Fibularis Tertius M. perform?

A

Dorsiflexion

Eversion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

This muscle is lateral to the Tibialis Anterior M. and attaches proximally to the anteromedial fibula and interosseous membrane. Distally attaches to the base of distal phalanx of hallux.

A

Extensor Hallucis Longus M.

***Runs medial to Extensor Digitorum Longus M. – more central in the foot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

This nerve supplies all muscles of the anterior leg compartment.

A

Deep Fibular N.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The Deep Fibular N. runs inferomedially with the _______ _______ vessels between the Tibialis Anterior M. and the Extensor Hallucis Longus M.

A

Anterior Tibial (A. and V.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Where does the Deep Fibular N. provide cutaneous innervation?

A

Skin between the first and second digit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

This artery arises from the Popliteal A. and supplies blood to the anterior leg compartment.

A

Anterior Tibial A.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What demarcates the approximate point of the division of the Anterior and Posterior Tibial As.?

A

Tibial Tuberosity

20
Q

The Anterior Tibial A. passes anteriorly over the Interosseous Membrane with the Deep Fibular N., between which muscles?

A

Extensor Hallucis Longus M.

Tibialis Anterior M.

21
Q

Where does the Anterior Tibial A. terminate?

A

At ankle between malleoli to become Dorsalis Pedis A.

22
Q

What muscles are in the lateral leg compartment?

A

Fibularis Brevis M.

Fibularis Longus M.

23
Q

This is a list of over 7,500 internationally accepted terms for anatomical structures decided by the Federation of Associations of Anatomists (FIAA).

A

Terminologia Anatomica

24
Q

This muscle extends form the fibular head to the sole of the foot and is superficial to Fibularis Brevis M.

A

Fibularis Longus M.

25
Q

The Fibularis Longus M. attaches proximally to the fibular head, then passes inferior just posterior to the ________ _______ and attaches distally across the sole of the foot to the _______ _______ and _______ _______.

A

Lateral Malleolus
First Metatarsal
Medial Cuneiform

26
Q

What are the functions of the Fibularis Longus M.?

A

Eversion

Plantar flexion

27
Q

This is a component of the Calcaneus that separates the tendons of Fibularis Longus M. and Fibularis Brevis M.

A

Fibular Trochlea

***Ridge on lateral surface of Calcaneus

28
Q

This tarsal bone is the most lateral and contains a groove for the Fibularis Longus M.

A

Cuboid

29
Q

What is the name for the groove on the Cuboid for the Fibularis Longus M.?

A

Cuboid sulcus

30
Q

This bone articulates with the Calcaneus posteriorly, 4th and 5th metatarsals anteriorly, and Navicular and Lateral Cuneiform medially.

A

Cuboid

31
Q

This muscle is deep to Fibularis Longus M.

A

Fibularis Brevis M.

32
Q

The proximal attachment for the Fibularis Brevis M. is the inferolateral Tibia, then it descends posterior to the _______ _______ and attaches distally to the dorsal surface of the lateral tuberosity of the ________ ________.

A

Lateral Malleolus

Fifth Metatarsal

33
Q

What are the functions of the Fibularis Brevis M.?

A

Eversion
Plantar flexion

***Same as Fibularis Longus M.

34
Q

This branch of the Common Fibular N. begins between the Fibularis Longus M. and the Fibula.

A

Superficial Fibular N.

35
Q

What does the Deep Fibular N. innervate?

A 
Anterior leg compartment 
Ankle joint
Metacarpal phalangeal joints 
Dorsal intrinsic foot muscles 
Skin b/w first and second digits
36
Q

The Superficial Fibular N. descends between Fibularis Longus and Brevis Ms. then runs lateral to which muscle?

A

Extensor Digitorum Longus M.

37
Q

What does the Superficial Fibular N. innervate?

A

Lateral leg compartment
Anteroinferior leg (cutaneous)
Dorsal surface of foot (cutaneous)
Dorsal aspect of digits (cutaneous)

***Except between digits 1 and 2 – these have cutaneous innervation via Deep Fibular N.

38
Q

Why is the Common Fibular N. the most commonly injured LE nerve?

A

Because it winds superficially around the fibular head

39
Q

What does injury to the Common Fibular N. result in?

A

Paralysis of all anterior and lateral leg compartment muscles – results in foot drop from loss of dorsiflexion and eversion

40
Q

If a patient presents with a high-stepping gait, and they swing their leg strongly forward with their foot striking the ground with a “clop”, what is the diagnosis?

A

Injury to Common Fibular N.

Patient is experiencing foot drop

41
Q

If there is an injury to the Common Fibular N., where would there be loss of sensation?

A

Anterolateral leg

Dorsum of foot

42
Q

What provides arterial supply to the lateral leg compartment?

A

Branches passing anteriorly from the Fibular A.

***Only compartment without a distinct arterial branch traveling the compartment nerve (Superficial Fibular N.)

43
Q

This artery is the largest branch of the Posterior Tibial A.

A

Fibular A.

44
Q

Leg compartmental syndromes occur due the septa being very tough and trauma causing hemorrhage, edema, and inflammation. The intracompartmental pressure may lead to ischemia and permanent injury. What is a way to relieve pressure for this?

A

Fasciotomy – incising fascia to relieve pressure within the compartment

45
Q

This is caused by repetitive micro trauma to the Tibialis Anterior M. It induces small tears to the periosteum over the Tibia and to the overlying deep fascia.

A

Shin splints

46
Q

Shin splints are considered a mild form of compartmental syndrome due to the swelling of the ________ ________ from repetitive ground reaction force.

A

Tibialis Anterior M.

MSK Exam 2 (26 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions