Intercostals (Internal/External)

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Intercostals (Internal/External)

External Intercostals mm    ExternalExternal Intercostals: Origin and Insertion

Origin:  Inferior border of ribs as far back as posterior angles

Insertion: Superior border of ribs below

Actions: Respiration.

Daily uses: Breathing

Back to muscles

Internal Intercostals mm    Internal Intercostals: Origin and InsertionInternal

Origin:  Inferior border of ribs as far back as posterior angles

Insertion: Superior border of ribs below.

Actions: Respiration

Daily uses: Breathing

Cardio Revision

 

 

Other muscles …

Supraspinatus

Origin: Supraspinous fossa

Insertion: Greater tuberosity of the humerus

Actions: Abduction 
Stabilisation of the humerus

Innervation: Suprascapular nerve

Daily uses: Holding shopping bags away from the body

 

Teres Minor

Origin: Mid section of the lateral border of the scapula

Insertion: Greater tuberosity on the humerus

Actions:External rotation, 
Shoulder adduction

Innervation: Axillary nerve

Daily uses: Brushing hair

Subscapularis

Origin: Anterior (costal) surface of the scapula

Insertion: Lesser tuberosity of the humerus

Actions: Internal rotation
, Adduction

Innervation: Upper and lower subscapular nerves

Daily uses: Tucking the back of your shirt into your trousers

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