PAM Light & Laser Therapy

Question 1

What is the main effect of light therapy in physical rehabilitation?

Accepted Answer

To promote tissue healing, reduce pain, and decrease inflammation.

Answer

Light therapy, particularly Low-Level Laser Therapy (LLLT) and LED therapy, utilizes specific wavelengths of light to stimulate cellular function. Its main effects in rehabilitation include promoting tissue healing by enhancing cellular metabolism, reducing pain through analgesic mechanisms, and decreasing inflammation by modulating inflammatory pathways. It is a non-invasive treatment.

Question 2

Which type of light therapy is commonly used to treat musculoskeletal pain and inflammation?

Accepted Answer

Low-Level Laser Therapy (LLLT).

Answer

Low-Level Laser Therapy (LLLT), also known as cold laser therapy, is commonly used to treat musculoskeletal pain and inflammation. It delivers non-thermal photons of light to the body, which are absorbed by cells and stimulate various physiological processes, leading to reduced pain, decreased inflammation, and accelerated tissue repair without significant heat generation.

Question 3

What is the mechanism of action of laser therapy?

Accepted Answer

It stimulates mitochondria, promoting healing and reducing pain.

Answer

Laser therapy, specifically low-level laser therapy (LLLT) or photobiomodulation (PBM), works by delivering photons to tissues. These photons are absorbed by chromophores, primarily cytochrome c oxidase in the mitochondria. This absorption leads to increased ATP production, modulation of reactive oxygen species, and activation of transcription factors, ultimately promoting cellular repair, reducing inflammation, and alleviating pain.

Question 4

What is a common contraindication for light therapy?

Accepted Answer

Over areas with cancer, or for patients with photosensitivity disorders.

Answer

Light therapy is contraindicated over areas with known cancer because it could potentially stimulate cell growth or metastasis. Additionally, individuals with photosensitivity disorders (e.g., lupus, porphyria) are at risk of adverse reactions like rashes or burns due to their heightened sensitivity to light. These precautions ensure patient safety and prevent exacerbation of existing conditions.

Question 5

What is the typical wavelength range used in laser therapy?

Accepted Answer

600 nm to 1000 nm.

Answer

Therapeutic laser therapy, also known as photobiomodulation, typically utilizes wavelengths in the red (around 600-700 nm) and near-infrared (around 700-1000 nm) spectrum. These specific wavelengths are chosen because they penetrate tissue effectively and are optimally absorbed by chromophores like cytochrome c oxidase in the mitochondria. This absorption initiates the therapeutic cellular responses for healing and pain reduction.

(PAM) Physical Agent Modalities Certification Practice Test

(PAM) Physical Agent Modalities Certification Practice Test

PAM Light & Laser Therapy