BIOPAC® Systems, Inc. Logo

A06 Cockroach Ventral Nerve AP

This PRO lesson illustrates action potentials as they function through the conduction of cockroach ventral nerve cords.

By administering soft puffs of air to the “anal cerci” one can provoke and view action potentials as they travel in axons through the ventral nerve cord. The cerci have hundred of tiny hairs connected to individual mechanoreceptors. The small hairs respond to touch and small changes in air currents. The cockroach uses this information to evade predators.

In this lesson, stainless steel needle electrodes are placed under the cockroach ventral nerve cord to record the nerve response to stimulation. A puff of air is presented to the cerci and the response is recorded. This particular lesson shows the information being passed along the ventral nerve cord. The axons traveling through the nerve result in amplitude data spikes during recording, allowing one to study this phenomenon up close.

Experimental Objectives

  1. Stimulate the cerci by puffs of air and touch.
  2. Record the response to the stimulation.
  3. Compare cercal response, left side vs. right.
  4. Determine the number of cercal hairs that must be stimulated to produce a ventral nerve response.

Tasks Performed by the Student

Videos

Biopac Student Lab Student Download

Student Prep & Distance Learning

Click the link(s) below for sample data and/or lesson procedure video(s), BSL PRO Lesson procedures (PDF) for human lessons*, and graph template files (*.gtl) for BSL PRO Lessons. If more than one .gtl is available, download the .gtl with the _suffix to match BSL version and hardware.

Lesson Hardware

This lesson requires a Biopac Student Lab (BSL) System and the following hardware. If your BSL System does not include all hardware items, expand your system by selecting required items below. For more details, review the Lesson: L# BSL Lessons - see the Lab Manual or launch BSL; A# and H# BSL PRO Lessons, click the PDF link above to review full setup, recording, and analysis procedures.

ItemNameCart
EL452Needle electrode Unipolar 12 mm TPAdd to Cart
EL452Needle electrode Unipolar 12 mm TPAdd to Cart
BSLCBL8High-impedance Cable for MP36/36R, MP35 or MP46/45Add to Cart
Spotlight On
haptic transdcuer

Haptic (Tactile) Stimulation Transducer

The TSD190 is a haptic (tactile) stimulator that is ergonomically designed to strap onto a variety of body locations. It incorporates an internal electromagnetically actuated plunger which can be used to mechanically stimulate a 1.5 mm diameter area of skin surface; both plunger force and travel can be infinitely adjusted between zero and a specified […]

View All
Latest News

New Citations | Keeping Students Attentive in an Online Setting & More!

BIOPAC provides software and hardware that allows research teams to record and analyze numerous body signals for physiological experimentation. Here are a few notable studies using BIOPAC equipment for ECG, EDA, and Respiration data. What Keeps Students More Engaged? The question has been brought to the forefront during COVID, what variations of online learning keep students more engaged? […]

Electrocardiography Guide Now Available

BIOPAC’s comprehensive Introductory ECG Guide addresses fundamental to advanced concerns to optimize electrocardiography data recording and analysis. Topics include: ECG Complex; Electrical and Mechanical Sequence of a Heartbeat; Systole and Diastole; Configurations for Lead I, Lead II, Lead III, 6-lead ECG, 12-lead ECG, precordial leads; Ventricular Late Potentials (VLPs); ECG Measurement Tools; Automated Analysis Routines for extracting, […]

Read All
Request a Demonstration
Request a Demonstration