Pectoral region Flashcards Preview

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Flashcards in Pectoral region Deck (14):
1

What 3 muscles are in the Pectoral region?

Pectoralis major
Pectoralis minor
Serratus anterior

2

What is the main actions of the Pectoralis major?

Adduct humerus at shoulder
Medially rotate humerus at shoulder

3

What innervates the Pectoralis major?

Medial and lateral pectoral nerves

4

What is the main action of the Pectoralis minor?

Depresses the shoulder

5

What innervates the Pecoralis minor?

Medial pectoral nerve

6

What is the main action of the Serratus anterior?

Rotate the scapula so it can be raised over 90 degrees.
Holds scapula against the ribcage

7

What innervates the Serratus anterior?

Long thoracic nerve

8

When does the Serratus anterior become paralysed?

With damage to the long thoracic nerve

9

How can the Long thoracic nerve be damaged?

Trauma
Repetitive movements
Inflammation so pressure on nerve

10

Why do you get winging of the scapula with damage to the long thoracic nerve?

Because Serratus anterior is paralysed it no longer holds the scapula against the rib cage

11

What is the most superficial muscle in the Pectoral region?

The Pectoralis major

12

What is the most lateral muscle in the Pectoral region?

Serratus anterior

13

What is posterior to the Pectoralis major?

Pectoralis minor

14

What is special about Serratus anterior?

It has several strips that attach to the ribs.