Advanced Anatomy Lab 2: Muscles Exam Questions and Answers With
complete solution–Expert Verified | Latest Questions 2025
What is the attachment of the clavicular head of pectoralis major?: clavicle
What are the attachments of the sternocoastal head of pectoralis major?: ster-
num and coastal cartilages
What is the attachment of pectoralis major?: bicipital groove of humerus
What is the action of the clavicular head of pectoralis major?: flexes arm
What is the action of the sternocoastal head of pectoralis major?: extends arms
from a flexed position
What is the action of both heads of pectoralis major together?: adducts and medially
rotates arm
What are the innervations of pectoralis major?: lateral and medial pectoral nerves
What are the attachments of pectoralis minor?: upper ribs and coracoid process of scapula
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, What are the actions of pectoralis minor?: stabilizes scapula against thoracic wall by pulling it
inferiorly and anteriorly and elevates upper ribs
What is the innervation of pectoralis minor?: medial pectoral nerve
What are the attachments of subclavius?: 1st rib and inferior surface of clavicle
What is the action of subclavius?: stabilizes and depresses clavicle
What is the innervation of subclavius?: nerve to subclavius
What are the attachments of subscapularis?: subscapular fossa and lesser tubercle of
humerus
What are the actions of subscapularis?: medially rotates arm and hold humeral head in glenoid
cavity
What is the innervation of subscapularis?: upper and lower subscapular nerves
What are the attachments of coracobrachialis?: coracoid process of scapula and medial
surface of humerus
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complete solution–Expert Verified | Latest Questions 2025
What is the attachment of the clavicular head of pectoralis major?: clavicle
What are the attachments of the sternocoastal head of pectoralis major?: ster-
num and coastal cartilages
What is the attachment of pectoralis major?: bicipital groove of humerus
What is the action of the clavicular head of pectoralis major?: flexes arm
What is the action of the sternocoastal head of pectoralis major?: extends arms
from a flexed position
What is the action of both heads of pectoralis major together?: adducts and medially
rotates arm
What are the innervations of pectoralis major?: lateral and medial pectoral nerves
What are the attachments of pectoralis minor?: upper ribs and coracoid process of scapula
1/2
, What are the actions of pectoralis minor?: stabilizes scapula against thoracic wall by pulling it
inferiorly and anteriorly and elevates upper ribs
What is the innervation of pectoralis minor?: medial pectoral nerve
What are the attachments of subclavius?: 1st rib and inferior surface of clavicle
What is the action of subclavius?: stabilizes and depresses clavicle
What is the innervation of subclavius?: nerve to subclavius
What are the attachments of subscapularis?: subscapular fossa and lesser tubercle of
humerus
What are the actions of subscapularis?: medially rotates arm and hold humeral head in glenoid
cavity
What is the innervation of subscapularis?: upper and lower subscapular nerves
What are the attachments of coracobrachialis?: coracoid process of scapula and medial
surface of humerus
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