Assessment of facial nerve function in acoustic tumor disease by nasal muscle F waves and transcranial magnetic stimulation

A normative study on human facial F waves

“…In addition to our previous work,17–20 this report confirms the feasibility of recording facial F waves from the nasalis muscle. The first detailed report on human facial F waves was published in 1973 16.…”

A normative study on human facial F waves

“…In addition to our previous work,17–20 this report confirms the feasibility of recording facial F waves from the nasalis muscle. The first detailed report on human facial F waves was published in 1973 16.…”

Prognostic significance of preoperative electrophysiologic investigation for facial nerve outcome in acoustic neuroma surgery

“…2,5,6,9 We recently compared the efficacy of blink reflex, transcranial magnetic stimulation, and facial F-wave recording as a measure of the impact of acoustic tumor growth on clinically intact facial nerve function. 15 We demonstrated that electrophysiologic examination of the facial nerve reveals significant dysfunction in the absence of a clinically overt paresis. Furthermore, the extent of the electrophysiologic changes correlated with tumor diameter.…”

“…11 Because latencies are prolonged, a demyelinating neuropathy due to tumor compression or stretching of the nerve has been suggested. 11,15 The results of the present study correspond with the majority of other investigations in which the correlation of tumor size with postoperative HB grading has been noted. [2][3][4][5][6]9 Patient's age and surgical approach also bore prognostic information.…”

Facial F wave recording: A novel and effective technique for extra‐ and intraoperative diagnosis of facial nerve function in acoustic tumor disease

“…In our previous comparative study of F wave and FATMEP in patients with acoustic tumors, the closest correlation with tumor diameter was calculated for F wave latencies, followed by the response latency to cortical magnetic stimulation 10 . This can be interpreted as a consequence of an increasing focal demyelination at the site of the growing tumor 10,13 …”

“…The data presented above reveal that F wave latency increase reflects the impact of a growing Several electrodiagnostic methods have been used to assess facial nerve function in acoustic tumor disease, as are electroneurography, 3,14 electromyography, 13 blink reflex recording, 10,13 and TMEP recording. 10,14,17 If clinical facial function was normal, however, a correlation with tumor diameter was detected only for blink reflex 13 and for facial transcranial motor evoked potentials (FATMEP).…”

A normative study on human facial F waves

“…In addition to our previous work,17–20 this report confirms the feasibility of recording facial F waves from the nasalis muscle. The first detailed report on human facial F waves was published in 1973 16.…”

Prognostic significance of preoperative electrophysiologic investigation for facial nerve outcome in acoustic neuroma surgery

“…2,5,6,9 We recently compared the efficacy of blink reflex, transcranial magnetic stimulation, and facial F-wave recording as a measure of the impact of acoustic tumor growth on clinically intact facial nerve function. 15 We demonstrated that electrophysiologic examination of the facial nerve reveals significant dysfunction in the absence of a clinically overt paresis. Furthermore, the extent of the electrophysiologic changes correlated with tumor diameter.…”

“…11 Because latencies are prolonged, a demyelinating neuropathy due to tumor compression or stretching of the nerve has been suggested. 11,15 The results of the present study correspond with the majority of other investigations in which the correlation of tumor size with postoperative HB grading has been noted. [2][3][4][5][6]9 Patient's age and surgical approach also bore prognostic information.…”

Facial F wave recording: A novel and effective technique for extra‐ and intraoperative diagnosis of facial nerve function in acoustic tumor disease

“…In our previous comparative study of F wave and FATMEP in patients with acoustic tumors, the closest correlation with tumor diameter was calculated for F wave latencies, followed by the response latency to cortical magnetic stimulation 10 . This can be interpreted as a consequence of an increasing focal demyelination at the site of the growing tumor 10,13 …”

“…The data presented above reveal that F wave latency increase reflects the impact of a growing Several electrodiagnostic methods have been used to assess facial nerve function in acoustic tumor disease, as are electroneurography, 3,14 electromyography, 13 blink reflex recording, 10,13 and TMEP recording. 10,14,17 If clinical facial function was normal, however, a correlation with tumor diameter was detected only for blink reflex 13 and for facial transcranial motor evoked potentials (FATMEP).…”

A normative study on human facial F waves

“…In addition to our previous work,17–20 this report confirms the feasibility of recording facial F waves from the nasalis muscle. The first detailed report on human facial F waves was published in 1973 16.…”

Prognostic significance of preoperative electrophysiologic investigation for facial nerve outcome in acoustic neuroma surgery

“…2,5,6,9 We recently compared the efficacy of blink reflex, transcranial magnetic stimulation, and facial F-wave recording as a measure of the impact of acoustic tumor growth on clinically intact facial nerve function. 15 We demonstrated that electrophysiologic examination of the facial nerve reveals significant dysfunction in the absence of a clinically overt paresis. Furthermore, the extent of the electrophysiologic changes correlated with tumor diameter.…”

“…11 Because latencies are prolonged, a demyelinating neuropathy due to tumor compression or stretching of the nerve has been suggested. 11,15 The results of the present study correspond with the majority of other investigations in which the correlation of tumor size with postoperative HB grading has been noted. [2][3][4][5][6]9 Patient's age and surgical approach also bore prognostic information.…”

Facial F wave recording: A novel and effective technique for extra‐ and intraoperative diagnosis of facial nerve function in acoustic tumor disease

“…In our previous comparative study of F wave and FATMEP in patients with acoustic tumors, the closest correlation with tumor diameter was calculated for F wave latencies, followed by the response latency to cortical magnetic stimulation 10 . This can be interpreted as a consequence of an increasing focal demyelination at the site of the growing tumor 10,13 …”

“…The data presented above reveal that F wave latency increase reflects the impact of a growing Several electrodiagnostic methods have been used to assess facial nerve function in acoustic tumor disease, as are electroneurography, 3,14 electromyography, 13 blink reflex recording, 10,13 and TMEP recording. 10,14,17 If clinical facial function was normal, however, a correlation with tumor diameter was detected only for blink reflex 13 and for facial transcranial motor evoked potentials (FATMEP).…”