Muscles of the Thorax (Origin, Insertion, Function)

Content
0:00 Introduction
0:10 Division of the Thoracic Muscles
1:05 Subclavius Muscle
1:24 Serratus Anterior
1:58 Pectoralis Minor
2:23 Pectoralis Major
2:56 Subcostal Muscles
3:26 Transverse Thoracis
3:44 Internal Intercostal Muscles
3:59 External Intercostal Muscles
4:18 Levatores Costarum Muscles
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Superficial Muscles
- Thoracohumeral muscles
- Subclavius
- Serratus Anterior
- Pectoralis Minor
- Pectoralis Major
Deep Muscles
- Proper muscles of the thorax
- External Intercostal muscles
- Internal Intercostal muscles
- Subcostal
- Transverse Thoracis
- Levatores Costarum

Subclavius
musculus subclavius
- Origin: First Rib
- Insertion: Lower surface of clavicle
Serratus Anterior
musculus serratus anterior
- Origin: External Surface of Ribs 1-9
- Insertion: Medial border of Scapula
Pectoralis Minor
musculus pectoralis minor
- Origin: External Surface of Ribs 3-5
- Insertion: Coracoid process of Scapula
processus coracoideus scapulae
Pectoralis Major
musculus pectoralis major
- Clavicular Part
Pars clavicularis
- Sternocostal Part
Pars sternocostalis
- Abdominal Part
Pars abdominalis
- Insertion: Crest of the greater tubercle
crista tuberculi majoris humeri
Subcostal Muscles
Musculi subcostales
- Origin: Lower Rib
- Insertion: Upper Rib
Transverse Thoracis
musculus transversus thoracis
- Origin:
Internal Surface of Sternum
Xiphoid Process
Cartilage of 4th-7th Rib
- Insertion: Cartilage of 2nd-6th Rib
Internal Intercostal muscles
musculus intercostales interni
- Origin: Lower Rib
- Insertion: Upper Rib
External Intercostal muscles
Musculi intercostalis externi
- Origin: Upper Rib
- Insertion: Lower Rib
Levatores costarum
Musculi levatores costarum
- Levatores costarum breves
○ Origin:
Transverse Process C7-T11
○ Insertion:
One Rib Below
- Levatores costarum longi
○ Origin:
Transverse Process T8-T11
○ Insertion:
Two Ribs Below

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[@abodakka]

Simple and clear explanation

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Best animation
Clear explanation

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[@TaimTalksMed]

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[@user-bi9lj3iv4b]

what origin and insert mean?

[@semy1011]

That means where the muscle begins and where it ends

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