; The transverse (middle) part of the muscle is supplied by the superficial cervical artery, or by a The thoracic cage takes the form of a domed bird cage with the horizontal bars formed by ribs and costal cartilages. Innervation The subclavius is innervated by the subclavian nerve (C5-6), a small branch that arises from the superior trunk of brachial plexus. First rib. The suprascapular artery passes through the suprascapular notch, along with the suprascapular nerve to supply supraspinatus. Found between the two muscles are the lateral pectoral nerve and the pectoral branches of the thoracoacromial artery.. Blood supply to the sternochondral joints comes from branches of the internal thoracic artery, which stems from the subclavian artery. ; The middle trunk is formed from the root of C7 only. The shoulder girdle, also called the pectoral girdle, is an incomplete bony ring formed by the clavicle and scapula on each side of the body, joined anteriorly by the manubrium of the sternum.The bones of the shoulder girdle articulate with each other and partake in the formation of 4 joints that include: The sternoclavicular joint - formed between the sternum and The superior surface is unique in that it is marked by two Lymph nodes of the head, neck and upper limb function to receive, filter and transport lymphatic fluid from surrounding tissues and viscera back into the bloodstream via the thoracic duct, right lymphatic duct and/or subclavian lymphatic trunk.Lymph nodes and vessels of the head, neck and upper limb are generally divided into superficial and deep groups. In the shoulder and arm, the brachial plexus gives rise to two nerves: the suprascapular nerve; the axillary nerve; When the brachial plexus is injured, these nerves are affected and some interesting clinical syndromes can be observed.. Arteries and veins. Both profunda brachii and the brachial artery give important branches that form the elbow anastomoses. The superior surface is unique in that it is marked by two These nerves work in sync to manifest movements, reflexes, and vision. ; The whole anterior aspect of the vein, except for a short superior portion, lies deep to the sternocleidomastoid muscle.Below the sternocleidomastoid, the Anterior and right lateral to the brachiocephalic trunk are Do you know why Kenhub's anatomy quiz questions are your secret to success when learning cross sections? Both profunda brachii and the brachial artery give important branches that form the elbow anastomoses. The subclavian artery is a paired arterial vessel of the thorax.The right and left arteries have different origins; the left subclavian artery originates directly from the aortic arch, while the right subclavian artery originates from the brachiocephalic trunk.. The axillary vein is renamed the subclavian vein once it passes the lateral border of the first rib, All content published on Kenhub is reviewed by medical and anatomy experts. The pectoralis minor muscle is one of the most superficial muscles on the anterior aspect of the chest or thoracic wall, located deep only to the pectoralis major muscle.It is one of the anterior axioappendicular (thoracoappendicular) muscles, together with the pectoralis major, subclavius and serratus anterior. The information we provide is grounded on academic literature and peer-reviewed research. ; Two vascular compartments: contain the common carotid artery, internal jugular vein The suprascapular artery passes through the suprascapular notch, along with the suprascapular nerve to supply supraspinatus. The descending (upper) part of the muscle is supplied by transverse muscular branches arising from the occipital artery (branch of the external carotid), which passes along the deep surface of the muscle. Then, the light gets converted into an image in the brain. Although there is a dual supply to the brain, each division shares a common origin. The superior vena cava receives blood from the upper half of the body via the left and right brachiocephalic veins , and the inferior vena cava from the lower half, through the common iliac veins. These are as follows: Cervical region: vertebral, deep cervical and occipital arteries ; Thoracic region: dorsal branches of posterior intercostal and subcostal arteries; Lumbar region: lumbar and lateral sacral arteries ; Except for the occipital artery, which is a Here the artery is also referred to as the cavernous part. These nerves work in sync to manifest movements, reflexes, and vision. First rib. The shoulder girdle, also called the pectoral girdle, is an incomplete bony ring formed by the clavicle and scapula on each side of the body, joined anteriorly by the manubrium of the sternum.The bones of the shoulder girdle articulate with each other and partake in the formation of 4 joints that include: The sternoclavicular joint - formed between the sternum and As in the typical ribs, the tubercle has a facet for articulation with the transverse process of vertebrae. Here it forms the basilar artery. The thoracic cage takes the form of a domed bird cage with the horizontal bars formed by ribs and costal cartilages. The thoracic duct, cervical sympathetic trunk and first part of the vertebral artery (V1) all lie within this pyramidal space, passing between the longus colli and scalenus anterior muscles. Here, a pyramidal space is formed, with the first section of the subclavian artery forming its base. ; The inferior trunk is formed by the roots of C8 and T1. The left and right vertebral arteries unite after they enter the cranial vault through the foramen magnum at the pontomedullary junction. The arterial supply to trapezius varies depending on the level. The sensory and motor innervation of the eyes originate from six paired cranial nerves. Supraspinatus sometimes receives a collateral blood supply via the dorsal scapular artery. ; Two vascular compartments: contain the common carotid artery, internal jugular vein The suprascapular artery passes through the suprascapular notch, along with the suprascapular nerve to supply supraspinatus. Here it curves vertically and superiorly to exit the sinus through its roof and become the cerebral part of the internal carotid artery. Then, the light gets converted into an image in the brain. Then, the light gets converted into an image in the brain. Sometimes a fourth muscle, the scalenus minimus is present behind the lower portion of the scalenus anterior. Each trunk has a well-known scheme of origin from the roots of the brachial plexus: The superior trunk is formed by the roots of C5 and C6. Axillary artery (Arteria axillaris) The axillary artery is a large muscular vessel that travels through the axilla.It is responsible for carrying oxygen-rich blood to the upper limb, as well as to parts of the musculocutaneous system of the scapula and upper lateral thorax.. Sometimes a fourth muscle, the scalenus minimus is present behind the lower portion of the scalenus anterior. You can learn more about our content creation and review standards by reading our content quality guidelines. Within the thoracic cavity is the mediastinum.The mediastinum is the region of the thorax between the lungs.It extends from the level of the first rib, superiorly, Multifidus receives arterial blood supply from a number of arteries along the length of the vertebral column. All content published on Kenhub is reviewed by medical and anatomy experts. Major branches of the aorta include the brachiocephalic trunk, the left common carotid artery and the left subclavian artery. Kenhub does not provide medical advice. On the right-hand side of the body, the brachiocephalic trunk arises from the arch of the aorta and bifurcates at the upper border of the 2nd right sternoclavicular joint.It gives rise to the right subclavian artery as well as the right common carotid artery.. On the right-hand side of the body, the brachiocephalic trunk arises from the arch of the aorta and bifurcates at the upper border of the 2nd right sternoclavicular joint.It gives rise to the right subclavian artery as well as the right common carotid artery.. Lymph nodes of the head, neck and upper limb function to receive, filter and transport lymphatic fluid from surrounding tissues and viscera back into the bloodstream via the thoracic duct, right lymphatic duct and/or subclavian lymphatic trunk.Lymph nodes and vessels of the head, neck and upper limb are generally divided into superficial and deep groups. The shoulder girdle, also called the pectoral girdle, is an incomplete bony ring formed by the clavicle and scapula on each side of the body, joined anteriorly by the manubrium of the sternum.The bones of the shoulder girdle articulate with each other and partake in the formation of 4 joints that include: The sternoclavicular joint - formed between the sternum and Located deep to the pectoralis major and its covering fascia is another connective tissue layer known as 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. Key facts about the female breast; Mammary gland: Gross arrangement: 15-20 secretory lobes separated by suspensory ligaments. The neurovascular bundle formed by the artery and the cords of the brachial plexus are enveloped The common carotid artery is a large elastic artery, which provides the main blood supply to the head and neck region.There is one common carotid artery on either side of the body and these arteries differ in their origin. On the posterior aspect of the shaft of the humerus, profunda brachii branches into a middle and a radial collateral artery.The brachial artery gives off a superior ulnar collateral artery (about 1-2 cm below profunda brachii) and an inferior ulnar collateral artery Here it forms the basilar artery. Intercostal nerve Nervus intercostalis 1/4. The thoracic cage, also known as the rib cage, is the osteocartilaginous structure that encloses the thorax.It is formed by the 12 thoracic vertebrae, 12 pairs of ribs and associated costal cartilages and the sternum.. The left and right vertebral arteries unite after they enter the cranial vault through the foramen magnum at the pontomedullary junction. The first rib is the widest, shortest and has the sharpest curve of all the ribs. Within the sinus, the internal carotid artery travels anteriorly, in a horizontal manner until it reaches the anterior limit of the sinus. It is supported by the vertical sternum Together with other muscles of the region it produces The descending (upper) part of the muscle is supplied by transverse muscular branches arising from the occipital artery (branch of the external carotid), which passes along the deep surface of the muscle. The vertebral artery usually enters the transverse foramen at C6. The left counterparts to these Subscapularis is a strong triangular muscle that fills the subscapular fossa of scapula.Lying posterolateral to the thoracic cage, it starts as a wide muscle whose medial two-thirds originate from the subscapular fossa of scapula and from several tendinous intramuscular septa at the ridges of the fossa.The remaining fibers arise from an aponeurosis that covers the The thoracic cage takes the form of a domed bird cage with the horizontal bars formed by ribs and costal cartilages. 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. ; The middle trunk is formed from the root of C7 only. As in the typical ribs, the tubercle has a facet for articulation with the transverse process of vertebrae. The eyes are a set of sensory organs that play a crucial role in the visual system.