What artery passes through the scalene triangle?
The scalene triangle is bound by the anterior and middle scalene muscles, with the first rib at the base. The brachial plexus nerves (yellow) and the subclavian artery (red) pass through the scalene triangle, while the subclavian vein (blue) passes in front.
Which part of the subclavian artery is located between anterior and middle scalene muscles?
The subclavian artery is the artery that passes with the roots of brachial plexus between the anterior and middle scalene muscles, through the scalene space, over the first rib in the groove for the subclavian artery. It ends at the lateral border of the first rib and continues as the axillary artery.
What is the anterior scalene?
The anterior scalene, AKA scalenus anterior (scalenus anticus; Latin: musculus scalenus anterior) muscle is one of the lateral muscles of the neck, belonging to the scalene group. It is deeply placed, lying behind the Sternocleidomastoid. It is located between the subclavian vein and the subclavian artery.
What goes between anterior and middle scalene?
The brachial plexus and subclavian artery pass between the anterior and middle scalenes, while the subclavian vein and phrenic nerve pass anteriorly to the anterior scalene as the muscle crosses over the first rib.
What divides the axillary artery?
The pectoralis minor muscle is used as a landmark for dividing the axillary artery into three parts. Its origin is at the lateral margin of the first rib, before which it is called the subclavian artery. After passing the lower margin of teres major it becomes the brachial artery.
Where are Scalenes inserted?
The muscle extends posterolaterally and tapers into a thin tendon, which inserts into the external surface of the 2nd rib. The site of insertion is located posterior to the attachment of the serratus anterior muscle. Sometimes the fibres of the scalenus posterior can be blended with the fibres of the scalenus medius.
Where are scalene muscles?
The scalene muscles are located deep in relation to the sternocleidomastoid muscle, lateral to the cervical spine, connecting the vertebrae to the first two ribs. The deep fascia or prevertebral fascia envelop the scalene muscles.
What type of artery is subclavian?
The subclavian arteries are asymmetric paired arteries that supply blood to the posterior cerebrum, cerebellum, posterior neck, upper limbs and the superior and anterior chest wall.
Where is the anterior scalene?
neck
The anterior scalene, AKA scalenus anterior (scalenus anticus; Latin: musculus scalenus anterior) muscle is one of the lateral muscles of the neck, belonging to the scalene group. It is deeply placed, lying behind the Sternocleidomastoid. It is located between the subclavian vein and the subclavian artery.