Scalene Muscle origin ,Insertion,Innervation , Action,blood supply

scalene anterior muscle   (R, L) is a muscle in the neck; these muscles are often also classified in the lateral vertebral region. Each is responsible for movements of the vertebral column and aids in respiration.

Origin:➤  3rd, 4th, 5th, and 6th cervical vertebrae  anterior tubercles of the transverse processes  

Insertion:➤ Scalene tubercle on the inner border and upper surface of the 1st rib 

Innervation: ➤Anterior divisions of the lower cervical nerves (C04-C06) 

Action:➤Bends spinal column laterally ,and  elevates first and second ribs

 Blood supply:➤ Ascending cervical artery

 Scalene middle muscle (r, I) is a muscle in the neck; these muscles are often also classified in the lateral vertebral region. Each is responsible for movements of the vertebral column and aids in respiration.

Origin:➤ Posterior tubercles of the transverse processes of the lower six cervical vertebrae (CO2-C07) 

Insertion:➤ Upper surface of the 1st rib 

Innervation:➤ Anterior divisions of the lower cervical nerves (C03-C08) 

Action:➤ Bends spinal column laterally ,and  elevates first and second ribs

Blood supply:➤ Ascending cervical artery

 

 Scalenus posterior muscle (r, I) is a muscle in the neck that is also often also classified in the lateral vertebral region. It is responsible for movements of the vertebral column and aides in respiration.

Origin:➤ Posterior tubercles of the transverse processes of the lower two or three cervical vertebrae (C05-C07) 

Insertion:➤ Outer surface of the 2nd rib; occasionally blended with the scalenus medius 

Innervation:➤ Anterior divisions of the lower cervical nerves (C06-C08) 

Action:➤ Bends spinal column laterally ,and  elevates first and second ribs

Blood supply:➤ Ascending cervical artery