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{{Lead rewrite|date=August 2024}}
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{{Infobox medical condition (new)
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'''Idiopathic
==Signs and symptoms==
In general, ulnar [[Peripheral neuropathy|neuropathy]] will result in symptoms in a specific anatomic distribution, affecting the little finger, the ulnar half of the ring finger, and the [[Hand#Intrinsic|intrinsic muscles]] of the hand.
The specific symptoms experienced in the characteristic distribution depend on the specific location of ulnar nerve compression. The hallmark symptoms of ulnar neuropathy at the elbow (cubital tunnel syndrome) is paresthesia (tingling). This can progress to a loss of sensibility. Muscle weakness is usually experienced as a loss of dexterity.
[[Ulnar
In [[cubital tunnel syndrome]] (ulnar neuropathy at the elbow), sensory and motor symptoms tend to occur in a certain sequence. Initially, there may be intermittent paresthesia and loss of sensibility of the small and ulnar half of the ring fingers. Next is constant numbness (loss of sensibility). The final stage is intrinsic hand muscle atrophy and weakness.
In contrast, when ulnar neuropathy occurs at the wrist (
==Diagnosis==
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Dellon and Goldberg modified the classification to subdivide grade 2 neuropathy into grade 2A and 2B on the basis of the extent of motor compromise. The modified classification is as follows: Type 1 Subjective sensory symptoms without objective loss of two-point sensibility or muscular atrophy; Type 2A Sensory symptoms and weakness on pinch and grip without atrophy of intrinsic muscles; Type 2B Sensory symptoms and atrophy and intrinsic muscle strength less than 3 out of 5 on the Medical Research Council scale; Type 3 Profound muscular atrophy and sensory disturbance.
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The most common location of ulnar nerve
====Etiology====
Compression of the ulnar nerve at the medial elbow may occasionally be caused by an [[Epitrochleoanconeus muscle|epitrocheloanconeus muscle]], an [[anatomical variant]].<ref name="pmid27398787">{{Cite journal|last1=Erdem Bagatur|first1=A.|last2=Yalcin|first2=Mehmet Burak|last3=Ozer|first3=Utku Erdem|date=1 September 2016|title=Anconeus Epitrochlearis Muscle Causing Ulnar Neuropathy at the Elbow: Clinical and Neurophysiological Differential Diagnosis|journal=Orthopedics|volume=39|issue=5|pages=e988–991|doi=10.3928/01477447-20160623-11|issn=1938-2367|pmid=27398787}}</ref>▼
▲Compression of the ulnar nerve at the medial elbow may
===Ulnar tunnel syndrome===
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==See also==
* [[Cervical
* [[Ulnar neuropathy]]
* [[Ulnar tunnel syndrome]]
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