BIOPAC® Systems, Inc. Logo

L20 Spinal Cord Reflexes

Anatomical and Physiological Elements of Simple Spinal Reflexes

In this BSL Spinal Cord Reflexes lesson, students examine properties of some simple neuromuscular reflexes commonly tested in physical diagnosis.

They will record and compare

Physicians and other clinicians test for the functional integrity of reflex pathways to obtain objective evidence regarding the function of muscles, peripheral nerves (motor and sensory), and the central nervous system. Conclusions drawn from testing reflexes are not the sole consideration in diagnosis but rather are considered in conjunction with other symptoms and signs of pathophysiology.

 

Experimental Objectives

  1. To become familiar with anatomical and physiological elements of simple spinal reflexes.
  2. To examine properties of some simple neuromuscular reflexes commonly tested in physical diagnosis.
  3. To measure and compare latent periods and reaction times of extensor and flexor reflexes.
  4. To elicit an extensor reflex and compare contractile force vs. stimulus strength.
  5. To apply the Jendrassik maneuver and observe exaggeration of an extensor reflex.
  6. To measure and compare reaction times of voluntary activation of skeletal muscle vs. involuntary (reflex) activation of skeletal muscle.

Tasks Performed by the Student

Students will note the spinal cord reflexes in the following six scenarios:

BSL Lessons are designed to allow at least four students to record and save data in a normal lab period (60-90 minutes). Typically, labs work most efficiently with three or more students working together at each BSL station.

Videos

BSL L20 Calibration

BSL 4 L20 Spinal Cord Reflexes

Biopac Student Lab Student Download

Lesson Hardware

This lesson requires a Biopac Student Lab (BSL) System and the following hardware: Reflex Hammer Transducer (SS36L); the response can be recorded with electrodes (such as EL503) and/or a goniometer (such as SS21L with TAPE1 adhesive). If your BSL System does not include all hardware items, expand your system by selecting the required items below. For more details, launch BSL or BSL Student to review the BSL Lab Manual for Lesson 20 Setup.

ItemNameCart
SS36LReflex Hammer Transducer - MP3X/45Add to Cart
Select OptionGeneral-purpose ElectrodesAdd to Cart
SS21LTwin-axis Goniometer 150mm, BSLAdd to Cart
TAPE1Adhesive Tape, single-sided, 9.1mAdd to Cart
Spotlight On
Ventilator Validation Kit

Ventilator Validation and Test Equipment

The Ventilator Validation Kit supports new prototype development, existing design validation for production testing, mobile field testing and verification, and other uses where accurate pressure and flow measurements are critical. The Ventilator Validation Kit provides ventilator manufacturers and prototype developers with a complete solution for validating new medical/hospital-grade ventilator products intended for human use. The VVK100-SYS includes […]

View All
Latest News

BIOPAC Systems Helps STARK Industries Launch VITAL Ventilator for NASA JPL

BIOPAC’s ventilator testing equipment and expertise supports STARK Industries’ effort to manufacture, validate, and test NASA JPL’s VITAL Ventilators Goleta, California – June 16, 2020 BIOPAC Systems, Inc. announced a partnership with STARK Industries, LLC to provide ventilator validation and testing equipment for the mass production of ventilators. STARK Industries was awarded a global license […]

New Citations | Go Inside with Imaging Solutions from BIOPAC!

Physiological Lung Testing in the MRI to Find Damage from Military Deployments Our military veterans who served overseas in the middle east often come home with scars both seen and unseen. For some vets, unfortunately, these scars can take the form of lung damage sustained due to sandstorms, burn pits, and other high toxicity situations apparent […]

Read All
Request a Demonstration
Request a Demonstration