Erb's point (neurology)
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2008-02-14T14:02:29Z
Arcadian
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moved [[Erb's point]] to [[Erb's point (neurology)]]: dab
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Caption2 = The right brachial plexus with its short branches, viewed from in front. |
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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}}
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[[Category:Head and neck]]
[[de:Erb-Punkt]]
[[pl:Punkt Erba]]