Ultrasound Assessment of the Displacement and Deformation of the Median Nerve in the Human Carpal Tunnel with Active Finger Motion

Yoshii, Yuichi; Villarraga, Hector R.; Henderson, Jacqueline; Chunfeng Zhao; Kai-Nan An; Amadio, Peter C.
December 2009
Journal of Bone & Joint Surgery, American Volume;Dec2009, Vol. 91-A Issue 12, p2922
Academic Journal
Background: Peripheral nerves are mobile structures, stretching and translating in response to changes in the position of adjuvant anatomic structures. The objective of this study was to develop a novel method to characterize the relative motion and deformation of the median nerve on cross-sectional ultrasound images of the carpal tunnel during active finger motion. Methods: Fifteen volunteers without a history of carpal tunnel syndrome or wrist trauma were recruited. An ultrasound scanner and a linear array transducer were used to evaluate the motion of the median nerve and the flexortendons within the carpal tunnel during motion from full extension to full flexion by the four fingers (fist motion) and by the long finger alone. The displacement of the median nerve relative to the long-finger flexor digitorum superficialis tendon as well as the perimeter, cross-sectional area, circularity, and aspect ratio of a minimum enclosing rectangle of the median nerve were measured. The data were compared between single-digit motion and fist motion and between extension and flexion positions. Results: The distance between the long-finger flexor digitorum superficialis tendon and the median nerve with isolated long-finger flexion was decreased in the ulnar-radial direction and increased in the palmar-dorsal direction as compared with the distance with four-finger flexion (p < 0.01). Compared with the values with fist motion, the aspect ratio was decreased and the circularity was increased with long-finger motion (p <0.01). Conclusions: This report presents a method with which to assess displacement and deformation of the median nerve on a cross-sectional ultrasound image during different finger motions. This method may be useful to assess pathological changes within the carpal tunnel, and we plan to perform a similar study of patients with carpal tunnel syndrome on the basis of these preliminary data.


Related Articles

  • Transverse Ultrasound Assessment of the Displacement of the Median Nerve in the Carpal Tunnel during Wrist and Finger Motion in Healthy Volunteers. Mitsuhiko Nanno; Takuya Sawaizumi; Norie Kodera; Yuji Tomori; Shinro Takai // Journal of Nippon Medical School;2015, Vol. 82 Issue 4, p170 

    Purpose: The purpose of this study was to investigate the displacement of the median nerve in the carpal tunnel during finger motion at varied wrist positions using transverse ultrasound in healthy volunteers, in order to clarify the appropriate position of a wrist splint in treating carpal...

  • Ä°diopatik Karpal Tünel Sendromlu Hastalarda Ultrason ve Manyetik Rezonans Görüntüleme ile Median Sinir Kesitsel Alan Ölçümleri. DUYMUŞ, Mahmut; ULAŞLI, Alper Murat; YILMAZ, Ömer; ASAL, Neşe; KACAR, Mahmut; NACIR, Bariş; ERDEM, Hatice Rana; KOŞAR, Uğur // Journal of Neurological Sciences;2013, Vol. 30 Issue 1, p59 

    Objective: In this study we aimed to measure the cross sectional area of the median nerve with ultrasound and magnetic resonance imaging in three different levels of carpal tunnel and determine the correlation between two modalities. Material and Method: 56 wrists of 36 idiopatic carpal tunnel...

  • Other tunnels, other nerves.  // British Medical Journal;7/3/1976, Vol. 2 Issue 6026, p3 

    Examines the possible causes of damage to the median nerve in the carpal tunnel. Exposure of some nerves to damage by outside pressure; Compression of a nerve trunk by lesions; Documentation of tarsal tunnel nerve compression.

  • Carpal Tunnel Syndrome: the painful hand. Pinette, Gilles // Windspeaker;Aug2000, Vol. 18 Issue 4, p30 

    Focuses on the carpal tunnel syndrome. Symptoms of the condition; Causes of the syndrome; Prevention and treatment of the median nerve injury.

  • Physical medicine & rehabilitation.  // Clinical & Investigative Medicine;Aug97 Supplement, Vol. 20, pS79 

    Presents an abstract of the research manuscript `MRI configuration changes correlated with electrophysiologic changes of the median nerve in carpal tunnel syndrome,' by Ansel Chu et al.

  • Investigating carpal tunnel syndrome. Lackey, Emma; Sutton, Ron // GP: General Practitioner;11/3/2003, p69 

    The carpal tunnel is a bony trough sealed with the flexor retinaculum, containing the median nerve and nine tendons. The median nerve supplies sensation to the thumb, index and middle fingers, part of the ring finger, and supplies the thenar eminence muscles. Any swelling in the tunnel easily...

  • Unusually high bifurcation of the median nerve resulting in two separate cylindrical compartments within the transverse carpal ligament: a case report. KAMAT, Ameya S.; WOON, Kelvin // International Journal of Anatomical Variations;2014, Vol. 7, p24 

    The median nerve courses through the carpal tunnel before entering the hand. Numerous descriptions of this pathway exist. Several variants exist and have been documented. We report a case of an unusually high bifurcation of the median nerve into radial and ulnar branches proximal to the...

  • Presence or Absence of Palmaris Longus and Fifth Superficial Flexor Digitorum; Is There Any Effect on Median Nerve Surface Area in Wrist Sonography. Enhesari, Ahmad; Saied, Alireza; Mohammadpoor, Lotfollah; Mousavi, Alia Ayatollahi; Arabnejhad, Fateme // Iranian Journal of Radiology;Dec2014, Vol. 11 Issue 4, p1 

    Background: Carpal tunnel syndrome (CTS) describes a set of symptoms caused by compression of the median nerve in the wrist, which is the most common site of nerve compression in the upper limb. This syndrome is a primary source of pain and reduced function in these patients, and the cause is...

  • A foregoing thenar muscular branch of the median nerve. Kuvat, Samet Vasfi; �z�akar, Levent; Yazar, Memet // Indian Journal of Plastic Surgery;Jan-Jun2010, Vol. 43 Issue 1, p106 

    We present a 62-year-old female patient who had an anatomic variation in the median nerve of the left hand. During surgery for releasing the left carpal tunnel, an abnormally high level of origin of the thenar muscular branch of the median nerve was detected, at 2.5 cm above the proximal border...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics