Anatomy

1
Class Topics
Title Anat Phys 1/9/07
Objectives

• .

• Anatomy
• Review Chest muscles
• Complete skinning
• Reflect chest muscles
• It is not enough to have a good mind the main
  thing is to use it well.
• Rene Descartes

Thursday, October 29, 2009 1001 AM
2
Class Assignments
By When
What

• Chest muscle quiz 1/16/07
• Due this class period
• Due next class period
• Due in the future

3
Review

• What is a synergist?
• What is an antagonist?
• What is a prime mover?
• What are the attachments for the pectoralis
  major?
• How does the pectoralis minor aid in breathing?
• How did the serratus anterior get its name?
• What are the origin and insertion?
• Are they interchangeable?

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Chest

• Pectoralis major
• Pectoralis minor
• Xiphihumeralis
• Pectoantebrachialis
• Intercostals
• Serratus anterior

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Pectoralis Major

• Attachments
• Sternum, clavicle, and cartilage of ribs 2-6
• Greater tubercle of humerus
• Prime mover in pushing forward

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Pectoralis Minor

• Attachments
• ribs 3-5
• Coracoid process of scapula
• Actions
• Elevates ribs - heavy breathing
• Rotates scapula

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Xiphihumeralis

• Attachments
• Xiphoid process
• Humerus

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Pectoantebrachialis

• Found only in the cat
• used as a synergist to pectoralis major and
  deltoids (clavobrachialis)

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Serratus Anterior

• Attachments
• ribs (anterior regions)
• scapula
• Action
• Pulls the scapula forward

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http//forum.bodybuilding.com/photo/showphoto.php?
photo18620cat2
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Intercostals

• Muscles found between the ribs
• Used to elevate or depress the ribs
• Used in breathing along with the diaphragm

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Dissection

• Complete the reflection of the chest muscles
• Not the intercostals!