Cooling Induces Motor Facilitation With Sympathetic Activation

NCT ID: NCT05832970

Last Updated: 2023-04-27

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 11 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2023-04-03
• Study Completion Date: 2023-04-08

Brief Summary

Cryotherapy has beneficial effects such as motor facilitation, increase isometric force generation, and reduce spasticity.

It is known that the muscle spindle has sympathetic innervation. Muscle spindle sensitivity increase with sympathetic activity. This research has three hypotheses: First, short-term cold application to the skin increases sympathetic activity. Second, there is an increase in muscle spindle sensitivity with increased sympathetic activity. Third, the effect of short-term cold on muscle spindle sensitivity continues until the skin temperature returns to normal. The purpose of this research is to test these hypotheses.

Detailed Description

Cryotherapy is a frequently used treatment method in sports medicine and rehabilitation due to its beneficial neuromuscular effects. Its main beneficial effects are motor facilitation, increase isometric force generation, and reduce spasticity. The motor effects of cryotherapy may differ depending on the duration of application, the coolant used agent (ice, ice water, coolant spray, etc.), and the thickness of the subcutaneous adipose tissue. The short-term cold application increases the force of contraction with motor facilitation. As the cold application period gets longer, the effects of the cold that inhibit motor functions such as gamma motor neuron inhibition, muscle spindle inhibition, and muscle conduction block come to the fore.

It is known that the muscle spindle has sympathetic innervation. It has been reported in recent studies that mental arithmetic, cold application to the skin, isometric contraction of remote muscles, and ischemia increase muscle spindle sensitivity through increased sympathetic activity. However, there are very limited studies showing that cold application increases muscle spindle sensitivity through increased sympathetic activity. On the other hand, in terms of determining treatment and rehabilitation strategies, it is important to know how long the effect of the cold application on muscle spindle sensitivity continues. However, it is not clear how long the effect of the cold application on muscle spindle sensitivity lasts after the cold application ends. There is a widespread belief that the motor facilitation effect of cryotherapy can occur with the stimulation of cutaneous cold receptors. Considering this view, it can be thought that the effect of the short-term cold application on muscle spindle sensitivity continues until the skin temperature returns to normal. This research has three hypotheses: First, short-term cold application to the skin increases sympathetic activity. Second, there is an increase in muscle spindle sensitivity with increased sympathetic activity. Third, the effect of short-term cold on muscle spindle sensitivity continues until the skin temperature returns to normal. The purpose of this research is to test these hypotheses.

Conditions

Cryotherapy Effect

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: BASIC_SCIENCE
• Blinding Strategy: NONE

Study Groups

Hand cooling

Records will be taken for Baseline electromyography, Heart rate, H-reflex, and T-reflex measurements before, during, and at 0, 3, 6, 9, 12, and 15. minutes before applying 2-4 degrees Celsius cold to the back of the hand in this group.

Group Type: EXPERIMENTAL

Brief skin cooling

Intervention Type: OTHER

Brief skin cooling will be applied to the hand using the cold-bath immersion

Interventions

Brief skin cooling

Brief skin cooling will be applied to the hand using the cold-bath immersion

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Being healthy
• Being a young adult (20-45 years old)
• Volunteer

Exclusion Criteria

• Scar, dermatitis, etc. in the skin tissue where the superficial electromyography electrode will be placed
• Upper extremity bone and joint disease, history of neuromuscular disease
• Heart disease, Hypertension
• Cold intolerance

• Minimum Eligible Age: 20 Years
• Maximum Eligible Age: 45 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: Yes

Sponsors

Istanbul Physical Medicine Rehabilitation Training and Research Hospital

OTHER_GOV

Sponsor Role: lead

Responsible Party

Ilhan KARACAN

Principal Investigator

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

ILHAN KARACAN, MD, Prof

Role: PRINCIPAL_INVESTIGATOR

İstanbul Physical Therapy Rehabilitation Training & Research Hosptial

Locations

Istanbul Physical Medicine Rehabilitation Training & Research Hospital

Istanbul, , Turkey (Türkiye)

Countries

Turkey (Türkiye)

Other Identifiers

CIMFSA

Identifier Type: -

Identifier Source: org_study_id