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Anatomy HK 3401 > Anterior Thoracoappendicular Muscles > Flashcards

Anterior Thoracoappendicular Muscles Flashcards

1
Q

What are the anterior thoracoappendicular muscles?

A

pectoralis major
pectoralis minor
serratus anterior
subclavius

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2
Q

What is the triangular-shaped region under the shoulder joint where the arm connects to the shoulder?

A

axilla

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3
Q

Where does pectoralis major originate from?

A

medial 1/2 of clavicle
manubrium/ sternum

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4
Q

Where does pectoralis major insert?

A

intertubercular groove of humerus- lateral lip

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5
Q

What is the innervation of the pectoralis major?

A

medial pectoral nerve
lateral pectoral nerve

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6
Q

Where does pectoralis minor originate from?

A

ribs 3-5

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7
Q

Where does pectoralis minor insert?

A

coracoid process of scapula

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8
Q

What is the innervation of pectoralis minor?

A

medial pectoral nerve
lateral pectoral nerve

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9
Q

What is the function of pectoralis minor?

A

stabilizes scapula

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10
Q

How does pectoralis minor stabilize the scapula?

A

draws scapula inferiorly/ anteriorly against thorax

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11
Q

When do you use pectoralis minor?

A

stretching upper limb forward (touch something just out of reach)s

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12
Q

Where does serratus anterior originate from?

A

lateral surface of ribs 1-8

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13
Q

Where does serratus anterior insert?

A

anterior surface/ medial border of scapula

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14
Q

What is the action of serratus anterior?

A

scapula protraction
holds scapula against thorax
rotation of scapula

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15
Q

What is the innervation of serratus anterior?

A

long thoracic nerve

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16
Q

Where does subclavius originate from?

A

rib 1

17
Q

Where does subclavius insert?

A

inferior/ middle aspect of clavicle

18
Q

What are the actions of subclavius?

A

anchor/ depress clavicle
stabilize clavicle during upper limb movement
resist tendency for clavicle to dislocate at sternoclavicular joint

19
Q

What muscle do you use primarily in tug of war?

A

subclavius

20
Q

What is the innervation of subclavius?

A

nerve to subclavius

21
Q

What is the menomic for the muscles that insert from the intertubercular groove of humerus, lateral to medial?

A

PLT
pectoralis major
latissimus dorsi
teres major

22
Q

What muscles are associated with anterior wall of axilla?

A

pectoralis major
pectoralis minor

23
Q

What muscles are associated with posterior wall of axilla?

A

subscapularis
latissimus dorsi
teres major

24
Q

What muscles are associated with medial wall of axilla?

A

upper ribs covered by serratus anterior

25
Q

What muscles are associated with lateral wall of axilla?

A

humerus

Anatomy HK 3401 (7 decks)

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