title: MR imaging mapping of skeletal muscle denervation in entrapment and compressive neuropathies.
abstract: The diagnoses of entrapment and compressive neuropathies have been based on the findings from clinical examinations and electrophysiologic tests, such as electromyography and nerve conduction studies. The use of magnetic resonance (MR) imaging for the diagnosis of entrapment or compressive neuropathies is increasing because MR imaging is particularly useful for discerning potential causes and for identifying associated muscle denervation. However, it is sometimes difficult to localize nerve entrapment or demonstrate nerve compression lesions with MR imaging. Nevertheless, even in these cases, MR imaging may show denervation-associated changes in specific muscles innervated by the affected nerves. The analysis of denervated muscle distributions by using MR imaging, with a knowledge of nerve innervation patterns, would be helpful for determining the nerves involved and the levels of nerve entrapment or compression. In this context, the mapping of skeletal muscle denervation with MR imaging has a supplementary or even a primary role in the diagnosis of entrapment and compressive neuropathies.
authors.affiliation: Department of Radiology, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Su-Jin
authors.initials: SJ
authors.lastname: Kim
authors.forename: Sung Hwan
authors.initials: SH
authors.lastname: Hong
authors.forename: Woo Sun
authors.initials: WS
authors.lastname: Jun
authors.forename: Ja-Young
authors.initials: JY
authors.lastname: Choi
authors.forename: Jae Sung
authors.initials: JS
authors.lastname: Myung
authors.forename: Jon A
authors.initials: JA
authors.lastname: Jacobson
authors.forename: Joon Woo
authors.initials: JW
authors.lastname: Lee
authors.forename: Jung-Ah
authors.initials: JA
authors.lastname: Choi
authors.forename: Heung Sik
authors.initials: HS
authors.lastname: Kang
mesh_terms: D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009121:Muscle Denervation; D018482:Muscle, Skeletal / Q000294:innervation* / Q000473:pathology*; D009408:Nerve Compression Syndromes / Q000473:pathology*; D010525:Peripheral Nerves / Q000473:pathology*