Upper Body Muscles

Table of Contents

• Pectoralis Mayor (Pectorals)
• Serratus Anterior
• Rectus Abdominus (Abs)
• Obliques
• Trapezius
• Latisimus Dorsi (Lats)
• Infraspinatus, Teres Minor, Teres Mayor, Rhomboid Mayor
• Links

Full Upper Body ^

General Torso Anatomy References

Upper Body Muscles From Multiple sides and poses

Pectoralis Mayor (Pectorals) ^

Origins/ Insertions In Short

MUSCLE	Pectoralis Mayor
-
ORIGIN	Clavicle, Sternum, Top of the Rectus Abdominus
INSERTION	Upper part of Humerus
Functions	• Arm flexion • Arm extension • Arm abduction • Arm internal rotation
Remembering help	Pecs

Origins/ Insertions In More Detail

The Pectoralis Mayor is split into 3 parts.

• The Clavicular part, which is at the top
• The Sternocostal part, which is in the middle
• The Abdominal part, which is at the bottom

MUSCLE	Pectoralis Mayor Clavicular part (top)	Pectoralis Mayor Sternocostal part (mid)	Pectoralis Mayor Abdominal part (bot)
-
ORIGIN	Medial(Inner) half of Clavicle	Anterior Surface of Sternum (Middle of Sternum)	Top of the Rectus Abdominus
INSERTION	The Tubercle Grove of the Top of the Humerus Shaft	The Tubercle Grove of the Top of the Humerus Shaft	The Tubercle Grove of the Top of the Humerus Shaft

More Pectoralis Mayor Anatomy References

Serratus Anterior ^

Origins/ Insertions

MUSCLE	Serratus Anterior
-
ORIGIN	Ribs (1 - 8/10)
INSERTION	Scapula
Functions	• Scapula (shoulder) movement/ rotation
Remembering help	Serrated Blade

More Serratus Anterior Anatomy References

Rectus Abdominus (Abs) ^

Origins/ Insertions

MUSCLE	Rectus Abdominus
-
ORIGIN	Pubic Symphysis and Pubic Crest (Center of Pubis)
INSERTION	Xiphoid Process (Bottom tip) of Sternum, Costal Cartilages (Inner part) of ribs 5-7
Functions	• Trunk flexion • Moves the body between the ribcage and the pelvis
Remembering help	Abdominal Area, Rectus = Upright

More Rectus Abdominus Anatomy References

Obliques ^

Info

It's good to know about the Internal Obliques, they can however not be seen, because the External Obliques cover them. This is also why the External Obliques are often simply called Obliques.

The External Obliques almost fully cover the Rectus Abdominus (Abs), the part of the External Obliques that cover the Rectus Abdominus is however the thinnest and thus not really obscuring the Rectus Abdominus in mid/ stronger bodies.

Origins/ Insertions

MUSCLE	External Obliques	Internal Obliques
-
ORIGIN	External surfaces of ribs 5-12	-
INSERTION	Linea Alba (Ligament that runs from Sternum tip to Pelvis), Pubic Tubercle, Iliac Crest	-
Functions	• Trunk flexion • Trunk rotation	-
Remembering help	-	-

More Obliques Anatomy References

Trapezius ^

Origins/ Insertions In Short

MUSCLE	Trapezius
-
ORIGIN	Lower Back of Skull, Spine
INSERTION	Clavicle, Scapula
Functions	• Posture • Stand straight • Head up down and turn • Shoulder movement/ Scalpula control
Remembering help

Origins/ Insertions In More Detail

The Trapezius is split into 3 parts.

• The Descending part, being the upper part
• The Transverse part, being the middle part
• The Ascending part, being the lower part

MUSCLE	Trapezius Descending part (upper)	Trapezius Transverse part (middle)	Trapezius Ascending part (lower)
-
ORIGIN	Superior Nuchal Line (Lower Back of Skull)	C1-T3 Vertebrae (Upper/ Cervical Spine)	T4-T12 Vertebrae (Mid/ Thoracic Spine)
INSERTION	Lateral Third of Clavicle (Outer part of Clavicle)	Spine and Acromion Process of Scapula (Spine of Scapula continues into the Acromion Process)	Medial End of Scapula Spine (Inner Side of Scapula)

More Trapezius Anatomy References

The Cervical Area is a diamond shaped part of the Trapezius and the spine bones are especially pronounced here

Latisimus Dorsi (Lats) ^

Origins/ Insertions

MUSCLE	Latisimus Dorsi
-
ORIGIN	ToDo: T7-T12 vertebrae(Middle/ Thoracic Spine)
INSERTION
Functions
Remembering help	Sharks have a dorsal fin in this area

Parts of The Latisimus Dorsi

MUSCLE	Thoracolumbar Fascia	Sacral Area
-
Location
Info	A diamond shaped part of the Latisimus Dorsi	A triangle shaped part at the bottom of the Latisimus Dorsi

More Latisimus Dorsi Anatomy References

Infraspinatus, Teres Minor, Teres Mayor, Rhomboid Mayor ^

Origins/ Insertions

MUSCLE	Infraspinatus	Teres Minor	Teres Mayor	Rhomboid Mayor
-
INFO	Follows the Scapula Spine	Smallest of the 4		The Rhomboid Mayor can only be rarely seen, because it hides behind the mighty Trapezius. It's only seen allot when the arm rotates upwards or forwards.
ORIGIN	Medial Border (Scapula)/ Infraspinous Fossa (Scapula)	Lateral border (Scapula)	Inferior Angle (Scapula)	Medial Border (Scapula)
INSERTION	Humerus Tubercle	Humerus Tubercle	Humerus Front	Vertebrae (T2-T5)

More Infraspinatus, Teres Minor, Teres Mayor and Rhomboid Mayor Anatomy References

Links ^

• Male - Muscles As Separate SubTools (Lukas Kutschera)
• Male (Julian Khor)
• Male - Speed
• Male
• Female - Pose
• 2D - Female (David Finch)
• 2D - Female
• Clay - Female - Pose