Palpation of the lateral bands of the extensor apparatus of the fingers. Anatomy of a neglected clinical finding

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dc.contributor.authorCanoso, Juan J
dc.contributor.authorNaredo, Esperanza
dc.contributor.authorMartínez Estupiñán, Lina
dc.contributor.authorMérida Velasco, José Ramón
dc.contributor.authorPascual Ramos, Virginia
dc.contributor.authorMurillo González, Jorge Alfonso
dc.date.accessioned2024-01-09T11:59:15Z
dc.date.available2024-01-09T11:59:15Z
dc.date.issued2021-04-25
dc.description.abstractThis study aimed to determine by ultrasonography, and cadaveric dissection, whether the firm cords felt by palpation at the sides of the proximal phalanx (PP), actively flexing, and extending the proximal interphalangeal (PIP) joint while keeping the metacarpophalangeal (MCP) joint extended are the lateral bands (LBs) of the extensor apparatus. If so, palpation of the LBs could help evaluate hand conditions that impact the digits’ intrinsic muscles. To this end, the PP of the middle and ring fingers of the dominant hand of seven subjects were studied by palpation on both sides. Ultrasonography (US) was performed with a hockey-stick transducer placed on the ulnar side. Five cadaveric hands were dissected, exposing the dorsal extensor apparatus. On palpation, a firm cord was consistently felt at the PP's sides in all subjects. These cords moved widely forward on PIP flexion and backward with PIP extension. By US scanning, the cords corresponded to the LBs. However, the forward movement had only a median of 1.8 mm (range 0.7–3 mm) in the middle finger and a median of 1.1 mm (range 0.3–2.7 mm) in the ring finger compared with an estimated 5–10 mm upon palpation. Cadaveric dissection confirmed the forward movement of the LBs in PIP flexion. We concluded that the firm cords felt at the PP sides are the LBs of the extensor apparatus. We confirmed their movement with the active flexion/extension of the PIP joint. Comparing the wide palpatory and the meager US motion, a haptic illusion of motion may be present.
dc.description.departmentDepto. de Anatomía y Embriología
dc.description.facultyFac. de Medicina
dc.description.refereedTRUE
dc.description.statuspub
dc.identifier.citationCanoso JJ, Naredo E, Martínez-Estupiñán L, Mérida-Velasco JR, Pascual-Ramos V, Murillo-González J. Palpation of the lateral bands of the extensor apparatus of the fingers. Anatomy of a neglected clinical finding. J Anat. 2021 Sep;239(3):663-668.
dc.identifier.doi10.1111/joa.13446
dc.identifier.issn0021-8782
dc.identifier.officialurlhttps://onlinelibrary.wiley.com/doi/10.1111/joa.13446
dc.identifier.relatedurlhttps://pubmed.ncbi.nlm.nih.gov/33895987/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/92011
dc.issue.number3
dc.journal.titleJournal of Anatomy
dc.language.isoeng
dc.page.final668
dc.page.initial663
dc.publisherWILEY
dc.rights.accessRightsopen access
dc.subject.cdu611
dc.subject.keyworddorsal aponeurosis
dc.subject.keywordextensor apparatus
dc.subject.keywordlateral bands
dc.subject.keywordmetacarpophalangeal joint
dc.subject.keywordphysical examination
dc.subject.keywordproximal interphalangeal joint
dc.subject.ucmAnatomía
dc.subject.unesco2410.02 Anatomía Humana
dc.titlePalpation of the lateral bands of the extensor apparatus of the fingers. Anatomy of a neglected clinical finding
dc.typejournal article
dc.type.hasVersionCVoR
dc.volume.number239
dspace.entity.typePublication
relation.isAuthorOfPublication3c6ea353-33aa-4323-a620-6cce5d953ce3
relation.isAuthorOfPublication7a351e41-71e3-4b0e-b130-49213b6b3d50
relation.isAuthorOfPublication.latestForDiscovery3c6ea353-33aa-4323-a620-6cce5d953ce3
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