introduction: transcranial magnetic stimulation (tms) is a useful tool for assessment of corticospinal excitability (cse) changes in both healthy individuals and patients with brain disorders. the usefulness of tms-elicited motor evoked potentials (meps) for the assessment of cse in a clinical context depends on their intra-and inter-session reliability. this study aimed to evaluate if removal ...

The interosseous and lumbrical muscles in twenty-five hands of Japanese adult cadavers were dissected. The palmar and dorsal interosseous muscles continued, with few exceptions, into the wing tendons. The dorsal interosseous muscles gave off tendons which pierced the transverse laminae or passed deep to the transverse laminae, and attached to the bases of the proximal phalanges. The palmar inte...

OBJECTIVES The aim of this study was to evaluate the pain level of each muscle during an EMG study and also search for any association between the pain levels and gender. METHODS Two hundred and twenty-seven subjects (166 females and 111 males) participated in the present study. Numeric analogue scale (NAS) was obtained from the patients after needle EMG for each muscle. RESULTS In total, 1...

INTRODUCTION The human hand is a complex anatomic entity consisting of many muscles, nerves, and vessels, thus providing a special ability to perform accurate and meticulous movements. In this group of muscles are the four dorsal interosseous muscles. CASE PRESENTATION A distinct supernumerary fourth dorsal interosseous muscle was found in the right hand of the cadaver of a 76-year-old Caucas...

BACKGROUND Myofascial pain (MP) is a common disorder that can involve any skeletal muscle in the human body. There are no published reports of the referred pain patterns of the third and fourth dorsal interosseous muscles. OBJECTIVE To investigate the referred pain patterns of the third and fourth dorsal interosseous muscles. STUDY DESIGN Prospective evaluation. SETTING Academic medical c...

Carpal tunnel syndrome in the presence of anomalous median to ulnar nerve communications in the forearm produces a characteristic change in motor conduction studies. Median nerve stimulation at the elbow evokes a thenar muscle action potential (MAP) with an initial positive deflection not seen on stimulation at the wrist. In 63 patients this change occurred in 16 (25%) and is a useful additiona...

There have been suggestions from previous studies that patients with Charcot-Marie-Tooth disease (CMT) have weaker dominant hand muscles. Since all studies to date have included a heterogeneous group of CMT patients we decided to analyse hand strength in 43 patients with CMT1X. We recorded handedness and the MRC scores for the first dorsal interosseous and abductor pollicis brevis muscles, medi...

Patients diagnosed with the neurodegenerative disorder amyotrophic lateral sclerosis (ALS; also known as Lou Gehrig disease) frequently develop dissociated atrophy of the lateral intrinsic hand muscles (figure, A). Preferential wasting of abductor pollicis brevis and first dorsal interosseous muscles, with relative preservation of the lateral abductor digit minimi, is termed the ALS split hand....

Introduction Transcranial magnetic stimulation (TMS) is widely used to explore cortical physiology in health and disease. Surface electromyography (sEMG) appropriate for superficial muscles, but cannot be applied easily less accessible muscles. Muscle ultrasound (mUS) may provide an elegant solution this problem, fundamental questions remain. We the relationship between TMS evoked muscle potent...

During the educational dissection of a 72-year-old Chinese male cadaver, bilateral extensor digitorum brevis manus (EDBM) muscles were observed. The left EDBM muscle originated from the joint capsule ligament, running across the second dorsal interosseous muscle as double tendons (EDBM ulnar tendon and EDBM radial tendon) on the ulnar side of extensor digitorum communis (EDC)-index finger. The ...