Muscles of the Limbs Flashcards Preview

NLM1 Anatomy > Muscles of the Limbs > Flashcards

Flashcards in Muscles of the Limbs Deck (24):
1

What are the muscle compartments of the arm?

Anterior and posterior.

2

What structure separates the muscle compartments?

Deep fascia

3

What are the functions of the muscles in the anterior and posterior compartment?

Anterior - flex
Posterior - Extend

4

Which muscles are in the anterior compartment?

Biceps Brachii, coracobrachialis and Brachialis

5

Which nerve innervates anterior compartment of the arm?

Musculocutaneous

6

Which muscle is in the posterior compartment of the arm, and which nerve innervates it?

Triceps brachii, innervated by Radial nerve.

7

Where does the coracobrachialis attach?

Coracoid process of scapula to medial aspect of the shaft of the humerus.

8

Where do the 2 heads of biceps attach?

Long - supraglenoid tubercle
Short - coracoid process

9

What is the distal attachment of the biceps brachii?

Radial tuberosity and bicipital aponeurosis to deep fascia of forearm

10

How many heads does the triceps brachii have? Name them.

3. Medial, lateral and long.
The medial and lateral heads attach to the humerus, and the long head attaches to the infraglenoid tubercle.

11

Where does the triceps brachii muscle attach distally?

Ulna.

12

Where does the brachialis attach?

Proximally to the shaft of humerus, distally to coronoid process of ulna.

13

Name the 3 muscle compartments of the thigh, and the structure that separates them

Anterior, posterior and medial. Separated by deep fascia

14

What action do the muscles perform in each of the 3 compartments of the thigh.

Anterior -flex hip, extend knee. Posterior - extend hip, flex knee. Medial - adduct.

15

Which nerves innervate the 3 muscle compartments of the thigh?

Anterior - femoral. Medial - obturator. Posterior - sciatic

16

Which muscles are in the anterior compartment of the thigh?

Sartorius + Quadriceps - Rectus Femoris, vastus medialis, vastus lateralis, vastus intermedius.

17

What is the function of the sartorius

flex the hip, flex the knee(!)

18

Where are the greater and lesser trochanters?

Greater - lateral. Lesser - medially.

19

Which muscles form the posterior compartment of the thigh?

Hamstrings - biceps femoris, semimembranosus, semitendinosus

20

Where do the muscles of the posterior compartment of the thigh attach?

Proximally - all to the ischial tuberosity.
Distally - Medial tibia (semi membranosus/tendinosus) OR HEAD OF FIBULA (biceps)

21

Which nerves innervate posterior compartment of thigh?

Sciatic.

22

Which muscles form the medial compartment of the thigh, and what are their functions?

Adductor Longus, Adductor Brevis, Adductor Magnus, pectineus, gracilis, obturator externus. They are all ADDUCTORS.

23

Where is the common proximal atatchment for the muscles of the medial compartment of the thigh?

Pubic bone. They are innervated by the obturator nerve.

24

What is compartment syndrome?

An increase in volume in the compartments (separated by deep fascia) as a result of infection/trauma.