김기훈 교수

OBJECTIVE: To investigate the anatomic relationship between the superficial radial nerve (SRN) and the cephalic vein (CV) through ultrasonography due to the possibility of SRN injury during cephalic venipuncture. METHODS: Both forearms of 51 healthy volunteers with no history of trauma or surgery were examined in proximal to distal direction using ultrasonography. We measured the distance between the radial styloid process (RSP) and the point where the SRN begins contact with the CV, and measure

Ulnar nerve instability increased with elbow flexion and correlated with snapping of the triceps medial head. Ultrasonography of the ulnar nerve is an important tool in ulnar nerve instability assessment.

INTRODUCTION: We sought to establish the optimal recording position for antidromic conduction of the superficial peroneal nerve (SPN) by using ultrasonography (USG). METHODS: The sensory nerve action potentials (SNAPs) of the intermediate dorsal cutaneous nerve (IDCN) and medial dorsal cutaneous nerve (MDCN) in 64 limbs of 32 healthy participants were recorded (nerve conduction study [NCS]-1). Both nerves were identified by using USG, and the SNAPs were obtained from the USG-guided repositioned

ABSTRACT Introduction We identify sensory branches of the ulnar nerve—palmar ulnar cutaneous nerve (PUCN), dorsal ulnar cutaneous nerve (DUCN), and superficial sensory branch—using ultrasonography. Methods In 60 forearms of 30 healthy adult volunteers, the origin and size of the PUCN, DUCN, and superficial sensory branch were measured by ultrasonography. The relative pathway of the DUCN to the ulnar styloid process was also investigated. Results The PUCN was observed in 47 forearms (78%), and th

Entrapment of the LCSN can arise from tight shoes. US is useful for evaluating the cutaneous nerve lesions that may be too small to detect by MRI. Muscle Nerve 54: 801-804, 2016.

Additional slips of the triceps brachii have been reported in cadaver studies. We report the case of a 48-year-old man with no history of trauma who presented with a tingling sensation and weakness in his right hand. Electromyography revealed ulnar neuropathy around the elbow, with decreased conduction proximal to the medial epicondyle. On ultrasonography and magnetic resonance imaging, the ulnar nerve was found to be mildly swollen and covered by an additional slip of the triceps brachii muscle

BACKGROUND: Safe and accurate needle access to the rhomboid major (RM) during electromyography is challenging due to the overlying trapezius muscle and the risk of pneumothorax. OBJECTIVE: To investigate the RM anatomy associated with the trapezius using ultrasonography and to determine a safe and accurate needle insertion point for needle electromyography of the RM. DESIGN: Descriptive study. SETTING: Department of physical medicine and rehabilitation of a tertiary clinic center. PARTICIPANTS:

온라인 소매상이 온라인 시장의 소개 서비스를 통하여 동일 제품을 판매할 때, 온라인 소매상은 원래의 사이트와 온라인 시장의 제품 판매 가격을 정하게 된다. 본 연구는 온라인 소매상을 찾은 고객의 특성, 온라인 시장에서의 경쟁 정도, 그리고 소개 수수료 등에 따라서 온라인 소매상이 취해야 하는 최적의 가격 전략을 분석한다. 온라인 시장의 경쟁 정도가 강하고, 온라인 소매상을 찾는 충성 고객의 수가 상대적으로 많고, 소개 수수료가 낮을수록 온라인 소매상은 원래의 사이트에서 더 비싸게 제품을 판매해야 한다. 마지막으로, G마켓에 참여하는 소규모 의류 온라인 소매상 및 백화점, 홈쇼핑 온라인 몰의 가격과 비교하여 본 논문의 분석 결과와 부합하는 면이 있음을 보인다.

BACKGROUND: Various active recording electrode positions for the trapezius motor nerve conduction study have been suggested. OBJECTIVE: To determine the optimal recording site of the trapezius muscles in a spinal accessory nerve conduction study. DESIGN: Retrospective descriptive study. SETTING: Department of physical medicine and rehabilitation in a tertiary clinic center. PARTICIPANTS: Thirty-four patients between 33 and 82 years of age with preoperative head and neck cancer (68 upper and midd

OBJECTIVE: To identify the optimal distal stimulation point for conventional deep peroneal motor nerve (DPN) conduction studies by a cadaveric dissection study. METHOD: DPN was examined in 30 ankles from 20 cadavers. The distance from the DPN to the tibialis anterior (TA) tendon was estimated at a point 8 cm proximal to the extensor digitorum brevis (EDB) muscle. Relationships between the DPN and tendons including TA, extensor hallucis longus (EHL), and extensor digitorum longus (EDL) tendons we

OBJECTIVE: The aim of the study was to identify the optimal needle placement for electromyographic examination of the biceps femoris short head muscle in relation to the biceps femoris long head tendon through sonographic evaluation. DESIGN: This cross-sectional observational study involved 36 lower limbs of 18 healthy volunteers. The distances and angles indicating the relationships between the common fibular nerve and the medial or lateral border of the biceps femoris long head tendon were mea

Several developed countries have recently provided electric vehicle consumers and producers with financialsubsidies. There has been some empirical research on the impact of government subsidies on the consumers’ purchaseof electric cars. However, little analytical research on the government subsidies for the electric car market exists. This research analyzes the impact of the government financial subsidies on the electric car price and technology levelas well as the consumers’ adoption of electr

Motor and sensory UNSW are considered useful assistive techniques for diagnosing UNW and localizing its lesion sites.

본 연구는 판매자와 구매자가 무료로 거래할 수 있는 플랫폼 상에 존재할 때, 어떤 경우에 판매자가 더 많은 구매자를 접하기 위해서 수수료를 지불할 용의가 있을 것인가를 분석한다. 판매자는 플랫폼이 제시하는 특별한 멤버십 서비스를 이용할 경우, 구매자에게 쉽게 노출될 수 있으며 이를 위하여 수수료를 지불할 수 있다. 본 연구는 경쟁 중인 두 플랫폼의 차별화 정도가 낮고, 판매자가 구매자에게 미치는 네트워크 효과가 크다면, 플랫폼이 판매자에게 무료로 특별 멤버십 서비스를 제공할 수 있음을 보여준다. 본 연구의 분석 결과는 전자 메일의 인증 가격 설정에도 적용될 수 있다.