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Rhomboid Muscles
The rhomboid muscles (), often simply called the rhomboids, are rhombus-shaped muscles associated with the scapula. There are two rhomboid muscles on each side of the upper back: * Rhomboid major muscle * Rhomboid minor muscle The large rhombus-shaped muscle, located under the trapezius muscle, in the upper part of the thoracic region of the back, and the small muscle, in the same way, participate in the movement of the scapula. Their functions are the following: * Drawing scapula superomedially * Supporting scapula * Rotating glenoid cavity inferiorly Both muscles are innervated by the dorsal scapular nerve, a branch of the brachial plexus. Additional images File:Rhomboid muscles animation small.gif, Rhomboid muscles. File:Muscles rhomboïdes.jpg, Rhomboid muscles. File:Gray203.png, Left scapula The scapula (: scapulae or scapulas), also known as the shoulder blade, is the bone that connects the humerus (upper arm bone) with the clavicle (collar bone). Like their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuchal Ligament
The nuchal ligament is a ligament at the back of the neck that is continuous with the supraspinous ligament. Structure The nuchal ligament extends from the external occipital protuberance on the skull and median nuchal line to the spinous process of the seventh cervical vertebra in the lower part of the neck. From the anterior border of the nuchal ligament, a fibrous lamina is given off. This is attached to the posterior tubercle of the atlas, and to the spinous processes of the cervical vertebrae, and forms a septum between the muscles on either side of the neck. The trapezius and splenius capitis muscle attach to the nuchal ligament. Function It is a tendon-like structure that has developed independently in humans and other animals well adapted for running. In some four-legged animals, particularly ungulates and canids, the nuchal ligament serves to sustain the weight of the head. Clinical significance In Chiari malformation treatment, decompression and duraplas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhomboid Major Muscle
The rhomboid major is a skeletal muscle of the back that connects the scapula with the vertebrae of the spinal column. It originates from the spinous processes of the thoracic vertebrae T2–T5 and supraspinous ligament; it inserts onto the lower portion of the Medial border of scapula, medial border of the scapula. It acts together with the Rhomboid minor muscle, rhomboid minor to keep the scapula pressed against thoracic wall and to retract the scapula toward the vertebral column. As the word ''rhomboid'' suggests, the rhomboid major is diamond-shaped. The ''major'' in its name indicates that it is the larger of the two rhomboids. Structure Origin The rhomboid major arises from the spinous processes of the thoracic vertebrae T2–T5 as well as the supraspinous ligament. Insertion It inserts on the Medial border of scapula, medial border of the scapula, from about the level of the scapular spine to the scapula's inferior angle. Innervation The rhomboid major, like the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
:en:Rhomboid Minor Muscle
In human anatomy, the rhomboid minor is a small skeletal muscle of the back that connects the scapula to the vertebrae of the spinal column. It arises from the nuchal ligament, the 7th cervical and 1st thoracic vertebrae and intervening supraspinous ligaments; it inserts onto the medial border of the scapula, and is innervated by the dorsal scapular nerve. It acts together with the rhomboid major to keep the scapula pressed against the thoracic wall. Anatomy Origin The rhomboid minor arises from the inferior border of the nuchal ligament, from the spinous processes of the vertebrae C7–T1, and from the intervening supraspinous ligaments. Insertion It inserts onto a small area of the medial border of the scapula at the level of the scapular spine. Innervation It is innervated by the dorsal scapular nerve (a branch of the brachial plexus), with most of its fibers derived from the C5 nerve root and only minor contribution from C4 or C6., p. 4 Blood supply The rhom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brachial Plexus
The brachial plexus is a network of nerves (nerve plexus) formed by the anterior rami of the lower four Spinal nerve#Cervical nerves, cervical nerves and first Spinal nerve#Thoracic nerves, thoracic nerve (cervical spinal nerve 5, C5, Cervical spinal nerve 6, C6, cervical spinal nerve 7, C7, cervical spinal nerve 8, C8, and thoracic spinal nerve 1, T1). This plexus extends from the spinal cord, through the cervicoaxillary canal in the neck, over the first rib, and into the axilla, armpit, it supplies Afferent nerve fiber, afferent and efferent nerve fibers to the chest, shoulder, arm, forearm, and hand. Structure The brachial plexus is divided into five ''roots'', three ''trunks'', six ''divisions'' (three anterior and three posterior), three ''cords'', and five ''branches''. There are five "terminal" branches and numerous other "pre-terminal" or "collateral" branches, such as the subscapular nerve, the thoracodorsal nerve, and the long thoracic nerve, that leave the plexus at vari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsal Scapular Nerve
The dorsal scapular nerve is a branch of the brachial plexus, usually derived from the ventral ramus of cervical nerve C5. It provides motor innervation to the rhomboid major muscle, rhomboid minor muscle, and levator scapulae muscle. Dorsal scapular nerve syndrome can cause a winged scapula, with Shoulder problem, pain and limited motion. Structure Origin The dorsal scapular nerve arises from the brachial plexus, usually from the plexus root (Ventral ramus, anterior (ventral) ramus) of cervical nerve C5. Course and relations Once the nerve leaves C5 it commonly pierces the Scalene muscles, middle scalene muscle. It continues deep to levator scapulae muscle and the rhomboids (minor superior to major). The nerve is accompanied by dorsal scapular artery. Function The dorsal scapular nerve provides motor innervation to the two rhomboid muscles, and the levator scapulae muscle. Clinical significance Injury to the dorsal scapular nerve is usually apparent on inspecti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Innervation
A nerve is an enclosed, cable-like bundle of nerve fibers (called axons). Nerves have historically been considered the basic units of the peripheral nervous system. A nerve provides a common pathway for the electrochemical nerve impulses called action potentials that are transmitted along each of the axons to peripheral organs or, in the case of sensory nerves, from the periphery back to the central nervous system. Each axon is an extension of an individual neuron, along with other supportive cells such as some Schwann cells that coat the axons in myelin. Each axon is surrounded by a layer of connective tissue called the endoneurium. The axons are bundled together into groups called fascicles, and each fascicle is wrapped in a layer of connective tissue called the perineurium. The entire nerve is wrapped in a layer of connective tissue called the epineurium. Nerve cells (often called neurons) are further classified as either sensory or motor. In the central nervous system ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glenoid Fossa
The glenoid fossa of the scapula or the glenoid cavity is a bone part of the shoulder. The word ''glenoid'' is pronounced or (both are common) and is from , "socket", reflecting the shoulder joint's ball-and-socket form. It is a shallow, pyriform articular surface, which is located on the lateral angle of the scapula. It is directed laterally and forward and articulates with the head of the humerus; it is broader below than above and its vertical diameter is the longest. This cavity forms the glenohumeral joint along with the humerus. This type of joint is classified as a synovial, ball and socket joint. The humerus is held in place within the glenoid cavity by means of the long head of the biceps tendon. This tendon originates on the superior margin of the glenoid cavity and loops over the shoulder, bracing humerus against the cavity. The rotator cuff also reinforces this joint more specifically with the supraspinatus tendon to hold the head of the humerus in the glenoid cavi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trapezius
The trapezius is a large paired trapezoid-shaped surface muscle that extends longitudinally from the occipital bone to the lower thoracic vertebrae of the human spine, spine and laterally to the spine of the scapula. It moves the scapula and supports the arm. The trapezius has three functional parts: * an upper (descending) part which supports the weight of the arm; * a middle region (transverse), which retracts the scapula; and * a lower (ascending) part which medially rotates and depresses the scapula. Name and history The trapezius muscle resembles a trapezoid, trapezium, also known as a trapezoid, or diamond-shaped quadrilateral. The word "spinotrapezius" refers to the human trapezius, although it is not commonly used in modern texts. In other mammals, it refers to a portion of the analogous muscle. Structure The ''superior'' or ''upper'' (or descending) fibers of the trapezius originate from the spinous process of C7, the external occipital protuberance, the me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhomboid Minor Muscle
In human anatomy, the rhomboid minor is a small skeletal muscle of the back that connects the scapula to the vertebrae of the spinal column. It arises from the nuchal ligament, the 7th cervical and 1st thoracic vertebrae and intervening supraspinous ligaments; it inserts onto the medial border of the scapula, and is innervated by the dorsal scapular nerve. It acts together with the rhomboid major to keep the scapula pressed against the thoracic wall. Anatomy Origin The rhomboid minor arises from the inferior border of the nuchal ligament, from the spinous processes of the vertebrae C7–T1, and from the intervening supraspinous ligaments. Insertion It inserts onto a small area of the medial border of the scapula at the level of the scapular spine. Innervation It is innervated by the dorsal scapular nerve (a branch of the brachial plexus), with most of its fibers derived from the C5 nerve root and only minor contribution from C4 or C6., p. 4 Blood suppl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lippincott Williams & Wilkins
Lippincott Williams & Wilkins (LWW) is an American imprint (trade name), imprint of the American Dutch publishing conglomerate Wolters Kluwer. It was established by the acquisition of Williams & Wilkins and its merger with J.B. Lippincott Company in 1998. Under the LWW brand, Wolters Kluwer, through its Health Division, publishes scientific, technical, and medical content such as textbooks, reference works, and over 275 scientific journals (most of which are medical or other public health journals). Publications are aimed at physicians, nurses, clinicians, and students. Overview LWW grew out of the gradual consolidation of various earlier independent publishers by Wolters Kluwer. Predecessor Wolters Samson acquired Raven Press of New York in 1986. Wolters Samson merged with Kluwer in 1987. The merged company bought J. B. Lippincott & Co. of Philadelphia in 1990; it merged Lippincott with the Raven Press to form Lippincott-Raven in 1995. In 1997 and 1998, Wolters Kluwer acquired Tho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinous Processes
Each vertebra (: vertebrae) is an irregular bone with a complex structure composed of bone and some hyaline cartilage, that make up the vertebral column or spine, of vertebrates. The proportions of the vertebrae differ according to their spinal segment and the particular species. The basic configuration of a vertebra varies; the vertebral body (also ''centrum'') is of bone and bears the load of the vertebral column. The upper and lower surfaces of the vertebra body give attachment to the intervertebral discs. The posterior part of a vertebra forms a vertebral arch, in eleven parts, consisting of two pedicles (pedicle of vertebral arch), two laminae, and seven processes. The laminae give attachment to the ligamenta flava (ligaments of the spine). There are vertebral notches formed from the shape of the pedicles, which form the intervertebral foramina when the vertebrae articulate. These foramina are the entry and exit conduits for the spinal nerves. The body of the vertebra an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elsevier
Elsevier ( ) is a Dutch academic publishing company specializing in scientific, technical, and medical content. Its products include journals such as ''The Lancet'', ''Cell (journal), Cell'', the ScienceDirect collection of electronic journals, ''Trends (journals), Trends'', the ''Current Opinion (Elsevier), Current Opinion'' series, the online citation database Scopus, the SciVal tool for measuring research performance, the ClinicalKey search engine for clinicians, and the ClinicalPath evidence-based cancer care service. Elsevier's products and services include digital tools for Data management platform, data management, instruction, research analytics, and assessment. Elsevier is part of the RELX Group, known until 2015 as Reed Elsevier, a publicly traded company. According to RELX reports, in 2022 Elsevier published more than 600,000 articles annually in over 2,800 journals. As of 2018, its archives contained over 17 million documents and 40,000 Ebook, e-books, with over one b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
