for intraoperative neurostimulation


Multimodal electric neurostimulator for intraoperative stimulation of nerves, muscles and the cortex:

•    Space-saving compact unit

•    State-of-the-art-touchscreen control

•    Preconfigured user programs

TWISTER® MM comes with preconfigured user programs with matching stimulation parameters for easy operation. All program options are clearly displayed on the touchscreen and the stimulation settings can be directly selected.

When starting the software, you will see relevant operating instructions and cable connections, which cotributes to the intuitive operating concept of TWISTER® MM, our compact stand-alone unit.

Direct Nerve Stimulation

for nerve stimulation in ENT, OMS and skull-base surgery as well as peripheral nerve surgery

With the "Direct Nerve Stimulation" user program of TWISTER® MM, motoric nerves can be electrically stimulated during surgery and their response can be verified visually or by palpation at the innervated target muscle. This method for localisation and functional monitoring is applied in the areas of ENT, OMS and skull-base surgery as well during peripheral nerve surgery.  

TWISTER® MM may be employed for monitoring the N. facialis and N. trigeminus during parotidectomy or mastoidectomy. Another field of application is monitoring of the N. accessorius during neck dissection or of the branches of the brachial plexus in tumour patients, patients injured in accidents or patients with compression syndrome.

N. facialis, N. trigeminus,
N. accessorius, brachial plexus

Cortical Mapping

for direct stimulation of the cortex in neurosurgery and epilepsy surgery

Direct stimulation of the cortex with the "Cortical Mapping" user program of TWISTER® MM has been designed for localisation of the motor areas in the brain and the speech centre in neurosurgery and epilepsy surgery. The anatomy of the cerebral cortex, which varies between individuals anyways, can be altered by tumours in the area of the nervous system. Getting to the tumour with as little damage to the surrounding tissue as possible and by preserving functional important areas of the brain becomes very difficult without technical assistance. 

With TWISTER® MM, it is possible to visualise a map of the patient's individual cortex and localise the regions of interest.


Motor centre, speech centre 
(Broca's area and Wernicke's area)



for electrical muscle stimulation in paediatric surgery

The “PSARP” user program of TWISTER® MM was specifically developed for electrical stimulation of the sphincter in posterior sagittal anorectoplasty (PSARP) according to Peña and de Vries. 

Stimulation at a frequency of 50 Hz allows the localisation and functional monitoring of muscular structures important to preserving continence and of the access route necessary for reconstruction.

The goal of the treatment is longterm faecal continence and additional quality of life for the mostly very young patients in paediatric surgery.


Anal sphincter complex - 
The stimulation pulses highlight 
the relevant muscular structures

Fields of application