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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[Garima]

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[tiffanyoldsoul]

That was really helpful. I think the video is concise and clear enough. Thank you so much, Sir!

[markojuric]

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[The_Wolf_Slayer]

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[mirfouziya]

External intercostal muscle originates from lower boader of rib and insertion is upper boader of rib

[KonKon-]

Awesome and helpful video, love it! Thanks a lot 💕

[RakhiMukharji]

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[Fan_fun]

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[thesimplewonders]

I wish you were there when i was in first year mbbs😅

[Greiffo]

Aren’t the subcostal muscles supposed to be inserted below the origin? 3:18