Erb's point (neurology) 4688898 191417376 2008-02-14T14:02:29Z Arcadian 104523 moved [[Erb's point]] to [[Erb's point (neurology)]]: dab {{Copyedit|date=June 2007}} {{Infobox Anatomy | Name = {{PAGENAME}} | Latin = | GraySubject = | GrayPage = | Image = Gray1210.png | Caption = Side of neck, showing chief surface markings. | Image2 = Gray808.png | Caption2 = The right brachial plexus with its short branches, viewed from in front. | Precursor = | System = | Artery = | Vein = | Nerve = | Lymph = | MeshName = | MeshNumber = | DorlandsPre = p_26 | DorlandsSuf = 12653313 | }} In neurology, '''Erb's point''' or '''punctum nervosum'''<ref>[http://lf1ep.wetpaint.com/page/Anatomy+Dissections Anatomy Dissections - LF1 English Parallel]</ref> is a site at the lateral root of the [[brachial plexus]], located 2-3 centimeters above the [[clavicle]]. ==Convergence of nerves== Erb's point is formed by the union of the [[Lateral pectoral nerve|C5]] and [[Lateral pectoral nerve|C6]] nerve roots, which later converge. At the nerve trunk, branches of [[suprascapular nerves]] and [[nerve to subclavius]] also merge. Afterwards,the merged nerve divides into [[anterior]] and [[posterior]] division of C5 & C6. Erb's point is the site '''after''' the converged trunk of C5 & C6 divides into suprascapular nerve and subclavius branches and '''before''' the anterior and posterior division. Taken together, there are 6 types of nerves that meet at this point. ==Clinical significance== Injury to this point is commonly sustained at birth or via a fall onto the shoulder. The nerve roots normally involved is C5 and partly C6. Injury to this area causes paralysis of [[biceps]], [[deltoid]], [[brachialis]], [[brachioradialis]], and [[coracobrachialis]] - which is supplied by the [[axillary nerve]] (deltoid), [[musculocutaneous nerve]] (biceps, brachialis and coracobrachialis) and [[radial nerve]] (brachioradialis). This causes the arm to hang at the side with the hand rotated medially- like a porter waiting for a tip, thus the nick names "[[police man]]'s tip", "porter's [[tip]] hand". This injury is also called "Erb-Duchenne palsy" or [[Erb's Palsy]].<ref> Moore ,Keith L. Ph.D , ''Clinically Oriented Anatomy'',2nd ed. Williams &Wilkins,Baltimore, 1985,p.658 </ref> ==Eponym== It is named for [[Wilhelm Heinrich Erb]].<ref>{{WhoNamedIt|synd|942}}</ref> ==See also== * [[Erb's point (cardiology)]] ==References== <references/> ==See also== * [[Posterior triangle of the neck]] ==External links== * {{SUNYAnatomyLabs|24|st|06|00}} {{neuroscience-stub}} [[Category:Head and neck]] [[de:Erb-Punkt]] [[pl:Punkt Erba]]