https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/304 2026-04-04T15:19:20Z 2026-04-04T15:19:20Z Kim, Byungjun Kang, Kyung Hun Yoon, Joon Shik https://scholarworks.korea.ac.kr/kumedicine/handle/2021.sw.kumedicine/64137 2024-07-11T10:00:49Z 2023-12-01T00:00:00Z

Title: Ultrasound assessment of medial crural cutaneous nerve and infrapatellar branch and of the saphenous nerve: establishing a safety zone for preventing nerve injury in knee surgery and injections Authors: Kim, Byungjun; Kang, Kyung Hun; Yoon, Joon Shik Abstract: PurposeOur study aimed to illustrate the positional relationship of the two branches of the saphenous nerve: the infrapatellar branch of the saphenous nerve (IPBSN) and medial crural cutaneous nerve (MCCN), as well as the anatomical landmarks using high-resolution ultrasound (HRUS) to help prevent iatrogenic nerve injury.MethodsWe used HRUS to explore the positional relationships among the anatomical landmarks, IPBSN, and MCCN in 40 knees of 20 participants. The distances from these branches to key reference points were recorded. Using the ultrasound caliper mode, we measured the depth from the skin surface to the nerves at four distinct points.ResultsThe average distances between IPBSN and medial border of patella (MBP) and IPBSN and medial border of patellar ligament (MBPL) were 47 +/- 7 mm and 42 +/- 9 mm, respectively. MCCN showed mean distances of 94 +/- 9 mm and 96 +/- 9 mm to MBP and MBPL, respectively. The mean distance from the upper edge of pes anserine to IPBSN at the patellar apex (PA) level was 24 +/- 10 mm and to MCCN was 34 +/- 9 mm.ConclusionWe used high-resolution ultrasound to evaluate IPBSN and MCCN and their positions relative to anatomical landmarks. The study results offer valuable insights into the course of these nerves, which can help establish a safety zone to prevent accidental nerve injuries during knee surgeries and injections.

2023-12-01T00:00:00Z Kim, Nackhwan https://scholarworks.korea.ac.kr/kumedicine/handle/2021.sw.kumedicine/64282 2024-07-11T12:30:37Z 2023-12-01T00:00:00Z

Title: Intraneural ganglion cyst of the peroneal nerve occurring after coronavirus disease-19 vaccination: A case report Authors: Kim, Nackhwan Abstract: Ganglion cysts are relatively common, but intraneural ganglion cysts (INGCs) within peripheral nerves are rare and poorly understood. We present the case of a 58-year-old woman who presented with acute right-foot drop. She experienced acute knee pain radiating from the lateral leg to the dorsal foot two days after the first coronavirus disease-19 (COVID-19) vaccination (BNT162b2, Pfizer-BioNTech). She had no history of trauma or medication use. Two weeks after the onset of symptoms, she developed a dorsiflexor weakness of the right foot (Medical Research Council grade, poor). The weakness worsened to a "trace" grade despite providing conservative management for one month. Ultrasonography revealed a fusiform echolucent structure within the course of the right common peroneal nerve around the fibular head. Magnetic resonance imaging revealed multiple intraneural cysts within the right common peroneal nerve. Nerve conduction and electromyographic studies revealed multiphasic motor unit action potentials accompanied by abnormal spontaneous activities in the innervated muscles, along with axonal degeneration of the deep peroneal nerves. Surgical removal of the cyst was performed, and the patient's symptoms gradually improved. Pathological examination revealed a cystic structure containing mucinous or gelatinous fluid and lined with flattened or cuboidal cells. The clinical course and sequential electromyographic findings relevant to this symptomatic cyst were temporally related to the vaccination date. The present case suggests that INGC-induced peroneal palsy is a possible complication after COVID-19 vaccination.

2023-12-01T00:00:00Z Kim, Jeong Min Park, Ji Eun Baek, Seung Jun Yang, Seung Nam https://scholarworks.korea.ac.kr/kumedicine/handle/2021.sw.kumedicine/62972 2024-07-11T09:34:29Z 2023-12-01T00:00:00Z

Title: Quantitative Analysis of Temporal Parameters Correlated with Aspiration and Lesion Location in Stroke Patients Authors: Kim, Jeong Min; Park, Ji Eun; Baek, Seung Jun; Yang, Seung Nam Abstract: The purpose of this study was to identify differences in temporal parameters correlating to the presence of aspiration and the severity of penetration-aspiration scale (PAS) in patients with dysphagia after stroke. We also investigated whether there was a significant difference in temporal parameters based on the location of the stroke lesion. A total of 91 patient videofluoroscopic swallowing study (VFSS) videos of stroke patients with dysphagia were retrospectively analyzed. Various temporal parameters including oral phase duration, pharyngeal delay time, pharyngeal response time, pharyngeal transit time, laryngeal vestibule closure reaction time, laryngeal vestibule closure duration, upper esophageal sphincter opening duration and upper esophageal sphincter reaction time were measured. Subjects were grouped by the presence of aspiration, PAS score, and location of the stroke lesion. Pharyngeal response time, laryngeal vestibule closure duration, and upper esophageal sphincter opening duration were significantly prolonged in the aspiration group. These three factors showed positive correlation with PAS. In terms of stroke lesion, oral phase duration was significantly prolonged in the supratentorial lesion group, while upper esophageal sphincter opening duration was significantly prolonged in the infratentorial lesion group. We have demonstrated that quantitative temporal analysis of VFSS can be a clinically valuable tool identifying dysphagia pattern associated with stroke lesion or aspiration risk.

2023-12-01T00:00:00Z Jeong, Eui Jin Kang, Mun Jeong Lee, Sekwang Hwang, Yeji Park, Ju Seob Kim, Ki Min Pyun, Sung-Bom https://scholarworks.korea.ac.kr/kumedicine/handle/2021.sw.kumedicine/64035 2025-09-29T07:30:23Z 2023-12-01T00:00:00Z

Title: Predictors of manual dexterity at 3 and 6 months after stroke: integration of clinical, neurophysiological, and neuroimaging factors Authors: Jeong, Eui Jin; Kang, Mun Jeong; Lee, Sekwang; Hwang, Yeji; Park, Ju Seob; Kim, Ki Min; Pyun, Sung-Bom Abstract: <jats:p>This retrospective study aimed to predict dexterity at 3 and 6 months post-stroke by integrating clinical, neurophysiological, and neuroimaging factors. We included 126 patients with first-ever, unilateral, and supratentorial stroke. Demographic, stroke characteristics, and initial clinical assessment variables [Mini-mental state examination and Fugl–Meyer Assessment Upper Extremity (FMA-UE)] were evaluated 2 weeks after stroke. Dexterity, measured using the Manual Function Test (MFT) hand subscore, was the primary outcome. The neurophysiological variables, upper limb somatosensory evoked potential (SEP) and motor evoked potential (MEP), were assessed 2 weeks post-stroke. The neuroimaging variable, fractional anisotropy (FA) of the corticospinal tract (CST), was assessed 3 weeks post-stroke. Multiple regression analysis revealed significant predictors for improved dexterity at 3 and 6 months post-stroke, including younger age, higher FMA-UE score, presence of waveforms in the SEP and MEP, and higher FA values in the CST (adjusted R<jats:sup>2</jats:sup> = 0.776, <jats:italic toggle="yes">P</jats:italic> < 0.001 at 3 months; adjusted R<jats:sup>2</jats:sup> = 0.668, <jats:italic toggle="yes">P</jats:italic> < 0.001 at 6 months; where MEP, SEP, and FA accounted together for an additional 0.079 and 0.166 of variance beyond age and FMA-UE, respectively). Subgroup analysis was conducted by categorizing the participants based on their initial hand function: those with no hand function (MFT hand subscore = 0) (N = 60) and those with a score >0 (N = 51). Initial FMA-UE was a primary predictive factor regardless of the time point or initial severity, whereas the presence of MEP was a significant predictor only in the group with no initial hand dexterity.</jats:p>

2023-12-01T00:00:00Z