Neurologger 2A

Neurologgers of the second generation were designed to record a large set of biological variables  (up to 4 analog channels) in their large integrated memory (1 GB, 2 GB by request), having size and weight suitable for attachment to a head of a mouse or a back of a zebra finch (small song bird weighing 14-17 g). The minimal weight of recording module  including two ZA5 35 mAh batteries is 1.3 g, the size is 22×15×5 mm.

Infrared (IR) receiver
for synchronization

3-D accelerometer

Connector for

4 neurophysiological channels with sampling rate up to 19.2 kHz
for EEG, ECG, EOG, EMG, LFPs and neuronal activity.
3-D accelerometer
Infrared (IR) synchronization with external equipment.
The recorder weight in the most complete configuration is 1.71 g
+ ~1 g typical battery weight makes total weight 2.71 g.
The battery holder can add 0.63 g.


Neurologger 2A other variants

3-D accelerometer,
256 MB memory,
weight 1.28 g
The lightest version:
electrodes are soldered
directly to the board,
clip connector for data
downloading, 1 GB,
weight 0.95 g
The same as before
but with the connector
for the electrodes,
weight 1.05 g
Micro board with
3-D accelerometer
is added, weight of
recording combination
1.61 g

Water-proof ECG recorder for marine birds
IR receiver is replaced by magnetic sensor.
Putting permanent magnet in the vicinity
of the sensor creates a label in the logger record.
Memory 1 GB, rechargeable battery 3.7V, 240 mAh.
The battery is sufficient for 4 days.
Total weight of encapsulated logger 20 g.


Neurologger 2A can record:

  • EEG (electroencephalogram)
  • LFPs (local field potentials)
  • Neuronal activity
  • EMG (electromyogram)
  • ECG (electrocardiogram)
  • Animal vocalizations below 9.6 kHz
  • 3-D acceleration
  • Event labels for precise synchronization with external equipment

Neurologger can be implanted to record brain activity, for instance, in large ruminants, or it can be placed in a rigid protective waterproof casing to record in  marine environments. Just ask!

Neurologger 2A has been used in the recent publications:

Uygun et al., 2016
Rattenborg et al., 2016
- In Nature Communications!
Zhang et al., 2016
Yu et al., 2015 - In Neuron!
Shine et al., 2015
Zhang et al., 2015 - In Nature Neuroscience!
Yu et al., 2014
Anisimov et al., 2014- In Nature Methods!
Backer et al., 2014
Scriba et al., 2014
Voirin et al., 2014
Amendola et al., 2014
Gelegen et al., 2014
Zhan et al. 2014 - In Nature Neuroscience!
Duriez et al. 2014
Scriba et al., 2013b
Scheffzük et al., 2013
Scriba et al., 2013a
Zecharia et al., 2012
Lesku et al., 2012 - Finally in Science!
Brankack et al., 2012
Scheffzük et al., 2011

Previous modification Neurologger 2
has been used in the following studies:

Brankack et al., 2010
Pang et al., 2009

Vyssotski et al., 2009
Rattenborg et al., 2008


Attention current Neurologger 2 users!
The latest version of Downloader utility is
Ver. 1.27 (01.05.2016).
Please update if you have an earlier version.

Neurologger 2/2A/2B

Neurologger 2 on a mouse

An example of Neurologger 2 neuronal record
(tetrode in the nidopallium of a homing pigeon)


Neurologger 2 on the head of a homing pigeon   Neurologger 2 on the head of a homing pigeon.
GPS logger is attached at the back

Technical data of the Neurologger 2A/2B

Number of channels:

4 with 2 ref. inputs
(ch1 and ch2 to ref1; ch3 and ch4 to ref2)

ADC resolution:

10 bit

Input range is factory-adjustable. Typical ranges are:

+/- 500 μV for EEG
+/- 1 mV for neuronal activity
+/- 3 mV for LFPs
+/- 6 mV for ECG

Neurologger mechanical dimensions (without batteries):

22x15x3 mm 3

Total mechanical dimensions (Neurologger, batteries):

22x15x5 mm 3

Weight of 1GB Neurologger board:

0.945 g

Weight of two 80mAh Renata ZA10 batteries:

0.635 g

Weight of head connector:

0.255 g

Weight of protective cover:

0.170 g

Weight of battery connecting wires:

0.050 g

Total weight:

2.055 g

Battery life time:

EEG logger, 4 channels,
100, 200 or 400 sps

1 day 9 h

Single unit logger, 4 ch x 9.6 ksps

23 h

1 GB memory data filling time:

4 channels, 100 sps

20 days 17 h

4 channels, 200 sps

10 days 8 h

4 channels, 400 sps

5 days 4 h

4 channels, 1600 sps

1 day 7 h

4 channels + 3D accelerometer, 100 sps

13 days 19 h

4 channels + 3D accelerometer, 200 sps

6 days 21 h

4 channels + 3D accelerometer, 400 sps

3 days 10 h

4 channels + 3D accelerometer, 1600 sps

20 h 42 min

4 channels, 9.6 ksps (with or w/o 3D accelerometer)

5 h 10 min

4 channels, 19.2 ksps (with or w/o 3D accelerometer)

2 h 35 min

4 channels, 33.3 ksps (with or w/o 3D accelerometer)

1 h 29 min

1 channels, 200 ksps (with or w/o 3D accelerometer)

59 min 39 s

1 GB data downloading time:

27 min 2 s


3 SPI, 8Mbps, converted to USB via custom adapter, power supply, one CMOS digital input for events recording (shared with SPI pin)

Data format:



Neurologger is a registered trademark.
Protected by U.S. patents #8,160,688; #9,492,085. Other patents pending.