scholarly journals Median nerve SEP after a high medullary lesion: preserved N18 and absent P14 components (case report)

1999 ◽  
Vol 57 (2A) ◽  
pp. 292-295 ◽  
Author(s):  
G. M. MANZANO ◽  
R. R. SCHULTZ ◽  
O. G. P. BARSOTTINI ◽  
E. ZUKERMAN ◽  
J. A. M. NÓBREGA
Keyword(s):  
Case Report ◽  
Median Nerve ◽  
The Right ◽  
Upper Third ◽  
Stimulation Of

Median nerve SEPs recorded from a patient with a high medullary lesion are described. The lesion involved the anteromedial and anterolateral right upper third of the medulla, as documented by MRI. Forty one days after the lesion, left median nerve SEP showed preserved N18 and absent P14 and N20 components; stimulation of the right median nerve evoked normal responses. These findings agree with the proposition that low medullary levels are involved in the generation of the N18 component of the median nerve SEP.

scholarly journals Case Report: Stimulation of the Right Amygdala Induces Transient Changes in Affective Bias

2014 ◽  
Vol 7 (5) ◽  
pp. 690-693 ◽  
Author(s):  
Kelly R. Bijanki ◽  
Christopher K. Kovach ◽  
Laurie M. McCormick ◽  
Hiroto Kawasaki ◽  
Brian J. Dlouhy ◽  
...  
Keyword(s):  
Case Report ◽  
Affective Bias ◽  
The Right ◽  
Stimulation Of

scholarly journals Direct MRI mapping of neuronal activity evoked by electrical stimulation of the median nerve at the right wrist

2009 ◽  
Vol 61 (5) ◽  
pp. 1073-1082 ◽  
Author(s):  
Yiqun Xue ◽  
Xiying Chen ◽  
Thomas Grabowski ◽  
Jinhu Xiong
Keyword(s):  
Electrical Stimulation ◽  
Median Nerve ◽  
Neuronal Activity ◽  
The Right ◽  
Stimulation Of

Functional magnetic resonance imaging of somatosensory cortex activity produced by electrical stimulation of the median nerve or tactile stimulation of the index finger

2000 ◽  
Vol 93 (5) ◽  
pp. 774-783 ◽  
Author(s):  
Maxwell Boakye ◽  
Sean C. Huckins ◽  
Nikolaus M. Szeverenyi ◽  
Bobby I. Taskey ◽  
Charles J. Hodge
Keyword(s):  
Electrical Stimulation ◽  
Median Nerve ◽  
Somatosensory Cortex ◽  
Tactile Stimulation ◽  
Index Finger ◽  
Functional Magnetic Resonance ◽  
Content Type ◽  
The Right ◽  
Fine Print ◽  
Stimulation Of

Object. Functional magnetic resonance (fMR) imaging was used to determine patterns of cerebral blood flow changes in the somatosensory cortex that result from median nerve stimulation (MNS).Methods. Ten healthy volunteers underwent stimulation of the right median nerve at frequencies of 5.1 Hz (five volunteers) and 50 Hz (five volunteers). The left median nerve was stimulated at frequencies of 5.1 Hz (two volunteers) and 50 Hz (five volunteers). Tactile stimulation (with a soft brush) of the right index finger was also applied (three volunteers). Functional MR imaging data were transformed into Talairach space coordinates and averaged by group. Results showed significant activation (p < 0.001) in the following regions: primary sensorimotor cortex (SMI), secondary somatosensory cortex (SII), parietal operculum, insula, frontal cortex, supplementary motor area, and posterior parietal cortices (Brodmann's Areas 7 and 40). Further analysis revealed no statistically significant difference (p > 0.05) between volumes of cortical activation in the SMI or SII resulting from electrical stimuli at 5.1 Hz and 50 Hz. There existed no significant differences (p > 0.05) in cortical activity in either the SMI or SII resulting from either left- or right-sided MNS. With the exception of the frontal cortex, areas of cortical activity in response to tactile stimulation were anatomically identical to those regions activated by electrical stimulation. In the SMI and SII, activation resulting from tactile stimulation was not significantly different (p > 0.05) from that resulting from electrical stimulation.Conclusions. Electrical stimulation of the median nerve is a reproducible and effective means of activating multiple somatosensory cortical areas, and fMR imaging can be used to investigate the complex network that exists between these areas.

scholarly journals Stuttered swallowing: Electric stimulation of the right insula interferes with water swallowing. A case report

BMC Neurology ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Peter Sörös ◽  
Faisal Al-Otaibi ◽  
Savio WH Wong ◽  
J Kevin Shoemaker ◽  
Seyed M Mirsattari ◽  
...  
Keyword(s):  
Case Report ◽  
Electric Stimulation ◽  
The Right ◽  
Stimulation Of

scholarly journals Safety of Radiofrequency Ablation of Thoracic T2 and T3 Sympathectomy in Palmar Hyperhidrosis: A Case Report

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Atef Mohammad Khalil ◽  
Joseph Makram Botros ◽  
Maged Labib Boules ◽  
Atef Kamel Salama ◽  
Safaa Gaber Ragab
Keyword(s):  
Case Report ◽  
Success Rate ◽  
Median Nerve ◽  
Severe Pain ◽  
Nerve Fibers ◽  
The Body ◽  
Palmar Hyperhidrosis ◽  
Invasive Technique ◽  
Right Hand ◽  
The Right

Introduction: Hyperhidrosis is the maladjustment of excess sweating in specific parts of the body. Radiofrequency (RF) therapy has been successfully used to treat hyperhidrosis with a success rate of 85% - 95% in patients refractory to sympathectomy. The main hypothesis was the association between reduced palmar hyperhidrosis and radiofrequency RF therapy. The RF therapy is a less invasive technique, including the utilization of electromagnetic energy that is deposited near the nerve tissue. The mechanism of action of continuous RF could be explained by the destruction of afferent nerve fibers on their way from a nociceptive focus to the central nervous system. Pulsed RF was invented to explore this possibility, with the sole purpose of finding a less destructive and equally effective technique for the application of RF to afferent pathways. Herein, we further evaluated whether the procedure was safe without any complications in routine follow-up in palmar hyperhidrosis. Case Presentation: Herein, we report the case of a male patient with an age of 22 years undergoing thermal RF sympathectomy therapy of thoracic T2 and T3 sympathetic ganglia for the palmar hyperhidrosis of his right hand observed for 3 months. The patient developed a contraction of the flexor involving the small muscles of the right hand with severe pain and congestion 17 days after the procedure without any other complications. The contraction was relieved by a sonar-guided median nerve block at the wrist with two injections of 2 mL lidocaine 2% and 2 mL dexamethasone. Conclusions: This study has been the first clinical case report complicated by the development of a contraction of the flexor muscles of the right hand with severe pain and congestion. The spasm was gradually relieved by sonar-guided median nerve injection at the level of the wrist and intended to assess the role of RF ablation with a success rate of 85% - 95% in palmar hyperhidrosis.

scholarly journals Case Report: Median nerve formation; an unusual position in the right upper extremity with clinical relevance

2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Joseph Alo Nwafor ◽  
Obinna Onwe Uchewa ◽  
Amaobi Jude Egwu ◽  
Godwin Ikechukwu Nwajagu
Keyword(s):  
Case Report ◽  
Median Nerve ◽  
Upper Extremity ◽  
Direct Relationship ◽  
Axillary Artery ◽  
Anatomical Variation ◽  
Unusual Position ◽  
Brachialis Muscle ◽  
The Right ◽  
Proximal Relation

There was no direct relationship between its formation and the axillary artery. Hence, it may be not be readily compromised. The site of MN formation was in proximal relation to the insertion of the coracobrahialis. This is clinically important as it may give a reinforced innervation to the muscle and proprioceptive impulses to medial fibres of the brachialis muscle. Conversely, the MN may be compressed by the tendon of the coracobrahialis, affecting its sympathetic filaments to the brachial artery. Furthermore, when present, it may be severed during reconstructive surgeries around the mid arm as the medial intermuscular septum fades out above the insertion of the coracobrachialis muscle. This report highlights the presence of a significant anatomical variation of the median nerve with regards to its site of formation, roots morphology and distribution, as well as its arterial relations for proper planning of surgeries.Key Words: Median nerve, arterial relations, right upper extremity, Morphology.

scholarly journals Absence of musculocutaneous nerve and accessory head of biceps brachii: a case report

2005 ◽  
Vol 38 (02) ◽  
pp. 114-146
Author(s):  
L Arora ◽  
R Dhingra
Keyword(s):  
Case Report ◽  
Median Nerve ◽  
Upper Limb ◽  
Biceps Brachii ◽  
Musculocutaneous Nerve ◽  
Nerve Supply ◽  
Biceps Brachii Muscle ◽  
Nerve Roots ◽  
Lateral Cutaneous Nerve ◽  
The Right

ABSTRACTDuring dissection of a 55-year-old female cadaver, we observed that three nerve roots contributed to the formation of Median nerve in her right upper limb. Along with this variation, absence of Musculocutaneous nerve was noticed. The muscles of front of arm i.e. Biceps Brachii, Brachialis and Coracobrachialis received their nerve supply from Median nerve. The Lateral cutaneous nerve of forearm was derived from Median nerve. Also an accessory head of Biceps Brachii muscle was present in the right arm of the same cadaver. It is extremely important to be aware of these variations while planning a surgery in the region of axilla or arm as these nerves are more liable to be injured during operations.

Epithelioid Sarcoma in the Median Nerve of the Hand: A Case Report

Hand ◽  
2021 ◽  
pp. 155894472110306
Author(s):  
Pilar Uceda ◽  
Manuel Zafra ◽  
Ricardo González-Cámpora ◽  
Carmen Ruiz-Bonilla
Keyword(s):  
Case Report ◽  
Local Recurrence ◽  
Median Nerve ◽  
Reconstructive Surgery ◽  
Peripheral Nerves ◽  
Epithelioid Sarcoma ◽  
Radical Resection ◽  
Metastatic Dissemination ◽  
The Right

Epithelioid sarcoma of the peripheral nerves is extremely rare. We present a case concerning the median nerve of the right hand in a 35-year-old woman who was treated with radical resection, reconstructive surgery, and chemotherapy. After 2 years of follow-up, there is no evidence of local recurrence or metastatic dissemination.

scholarly journals Indirect Vibration of the Upper Limbs Alters Transmission Along Spinal but Not Corticospinal Pathways

2021 ◽  
Vol 15 ◽  
Author(s):  
Trevor S. Barss ◽  
David F. Collins ◽  
Dylan Miller ◽  
Amit N. Pujari
Keyword(s):  
Median Nerve ◽  
Presynaptic Inhibition ◽  
Biceps Brachii ◽  
Motor Evoked Potentials ◽  
H Reflex ◽  
Cutaneous Reflexes ◽  
Spinal Pathways ◽  
Median Nerve Stimulation ◽  
The Right ◽  
Stimulation Of

The use of upper limb vibration (ULV) during exercise and rehabilitation continues to gain popularity as a modality to improve function and performance. Currently, a lack of knowledge of the pathways being altered during ULV limits its effective implementation. Therefore, the aim of this study was to investigate whether indirect ULV modulates transmission along spinal and corticospinal pathways that control the human forearm. All measures were assessed under CONTROL (no vibration) and ULV (30 Hz; 0.4 mm displacement) conditions while participants maintained a small contraction of the right flexor carpi radialis (FCR) muscle. To assess spinal pathways, Hoffmann reflexes (H-reflexes) elicited by stimulation of the median nerve were recorded from FCR with motor response (M-wave) amplitudes matched between conditions. An H-reflex conditioning paradigm was also used to assess changes in presynaptic inhibition by stimulating the superficial radial (SR) nerve (5 pulses at 300Hz) 37 ms prior to median nerve stimulation. Cutaneous reflexes in FCR elicited by stimulation of the SR nerve at the wrist were also recorded. To assess corticospinal pathways, motor evoked potentials (MEPs) elicited by transcranial magnetic stimulation of the contralateral motor cortex were recorded from the right FCR and biceps brachii (BB). ULV significantly reduced H-reflex amplitude by 15.7% for both conditioned and unconditioned reflexes (24.0 ± 15.7 vs. 18.4 ± 11.2% Mmax; p &lt; 0.05). Middle latency cutaneous reflexes were also significantly reduced by 20.0% from CONTROL (−1.50 ± 2.1% Mmax) to ULV (−1.73 ± 2.2% Mmax; p &lt; 0.05). There was no significant effect of ULV on MEP amplitude (p &gt; 0.05). Therefore, ULV inhibits cutaneous and H-reflex transmission without influencing corticospinal excitability of the forearm flexors suggesting increased presynaptic inhibition of afferent transmission as a likely mechanism. A general increase in inhibition of spinal pathways with ULV may have important implications for improving rehabilitation for individuals with spasticity (SCI, stroke, MS, etc.).

scholarly journals Formation of median nerve by three roots: A case report

1970 ◽  
Vol 6 (1) ◽  
pp. 47-50 ◽  
Author(s):  
N Satyanarayana ◽  
CK Reddy ◽  
P Sunitha ◽  
N Jayasri ◽  
V Nitin ◽  
...  
Keyword(s):  
Case Report ◽  
Brachial Plexus ◽  
Key Words ◽  
Median Nerve ◽  
Adult Male ◽  
Upper Limbs ◽  
Medical Sciences ◽  
Lateral Cord ◽  
Male Cadaver ◽  
The Right

During routine dissection of an adult male cadaver in the Department of Anatomy, College of Medical Sciences, Bharatpur, Nepal, the right median nerve was found to be formed by three roots. The finding was noted after thorough and meticulous dissection of the upper limbs of both sides (axilla, arm, forearm and palm). Out of the three roots forming the anomalous median nerve, two were from lateral cord and one from medial cord of brachial plexus. However, the distribution of the anomalous median nerve was normal in arm, forearm and palm. The arterial pattern in the arm (axillary and brachial arteries) was also normal. Key words: Cadaver; median nerve; brachial plexus DOI: 10.3126/jcmsn.v6i1.3602 Journal of College of Medical Sciences-Nepal, 2010, Vol. 6, No. 1, 47-50

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