Medial Pectoral nerve

Authors

Affiliations

Nathaniel Yomogida, B.S., SPT

Doctor of Physical Therapy

B.S. in Kinesiology

Chloë Kerstein, B.S., SPT

Doctor of Physical Therapy

B.A. in Neuroscience

Motor Innervation

Medial Pectoral n. Muscle Innervations
Muscle	Origin	Insertion	Innervation	Action
Pectoralis major	Clavicle (medial half)1 Sternum1 Costal cartilages 1-61 Rectus sheath (anterior layer)1 [Clavicle (medial half)](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_major_muscle.html#origin) [@gilroyAtlasAnatomy2020] [Sternum](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_major_muscle.html#origin) [@gilroyAtlasAnatomy2020] [Costal cartilages 1-6](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_major_muscle.html#origin) [@gilroyAtlasAnatomy2020] [Rectus sheath (anterior layer)](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_major_muscle.html#origin) [@gilroyAtlasAnatomy2020]	Humerus (crest of greater tubercle)1 [Humerus (crest of greater tubercle)](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_major_muscle.html#insertion) [@gilroyAtlasAnatomy2020]	Lateral pectoral n.1 Medial pectoral n.1 C5 - T11 [Lateral pectoral n.](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_major_muscle.html#nerve) [@gilroyAtlasAnatomy2020] [Medial pectoral n.](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_major_muscle.html#nerve) [@gilroyAtlasAnatomy2020] [C5](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_major_muscle.html#nerve) - [T1](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_major_muscle.html#nerve) [@gilroyAtlasAnatomy2020]	Clavicular & Sternocostal parts [Flexion](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_major_muscle.html#action) [@gilroyAtlasAnatomy2020] [Aids in respiration when shoulder is fixed](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_major_muscle.html#action) [@gilroyAtlasAnatomy2020] Entire muscle [Adduction](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_major_muscle.html#action) [@gilroyAtlasAnatomy2020] [IR](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_major_muscle.html#action) [@gilroyAtlasAnatomy2020]
Pectoralis minor	3-5 ribs1 [3-5 ribs](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_minor_muscle.html#origin) [@gilroyAtlasAnatomy2020]	Coracoid process1 [Coracoid process](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_minor_muscle.html#insertion) [@gilroyAtlasAnatomy2020]	Medial pectoral n.1 C8 - T11 [Medial pectoral n.](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_minor_muscle.html#nerve) [@gilroyAtlasAnatomy2020] [C8](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_minor_muscle.html#nerve) - [T1](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_minor_muscle.html#nerve) [@gilroyAtlasAnatomy2020]	Respiration [Assists in respiration](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_minor_muscle.html#action) [@gilroyAtlasAnatomy2020] Scapula [Depression](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_minor_muscle.html#action) [@gilroyAtlasAnatomy2020] [Downward rotation](/The Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Axioappendicular Anterior Muscles/pectoralis_minor_muscle.html#action) [@gilroyAtlasAnatomy2020]

References

1.

Gilroy AM, MacPherson BR, Wikenheiser JC, Voll MM, Wesker K, Schünke M, eds. Atlas of Anatomy. 4th ed. Thieme; 2020.