Podcast
Questions and Answers
Which of the following is NOT a function of neural structures?
Which of the following is NOT a function of neural structures?
What is the purpose of applying pressure at the carpal tunnel with 4.5 kg pressure for 30 seconds?
What is the purpose of applying pressure at the carpal tunnel with 4.5 kg pressure for 30 seconds?
What is the role of the mechanical interface in the 3-part system?
What is the role of the mechanical interface in the 3-part system?
What is the term for the ability of the nervous system to detect mechanical stimuli?
What is the term for the ability of the nervous system to detect mechanical stimuli?
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Which of the following is a susceptible site for nerve injury?
Which of the following is a susceptible site for nerve injury?
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What is the term for the study of the interaction between the nervous system and mechanical forces?
What is the term for the study of the interaction between the nervous system and mechanical forces?
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What is the purpose of palpating the radial nerve at the radial groove?
What is the purpose of palpating the radial nerve at the radial groove?
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What is the term for the movement of the nervous system in response to mechanical forces?
What is the term for the movement of the nervous system in response to mechanical forces?
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What is the term for the physiological functions of the nervous system?
What is the term for the physiological functions of the nervous system?
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What is the term for the container of the nervous system?
What is the term for the container of the nervous system?
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Study Notes
Susceptible Sites for Nerve Damage
- Abrupt neural branches, particularly in areas where the nerve's ability to move within surrounding structures is limited
- Examples: common plantar digital nerve in the web space between the third and fourth toes, common peroneal nerve as it traverses around the fibular head
- High-friction areas where nerves are close to unyielding interfaces
- Examples: nerves passing through the plantar fascia in the foot, brachial plexus passing over the first rib
- Tension points, such as the tibial nerve in the popliteal fossa, where abnormal stress can be placed on the nerve
Mechanosensitivity and Neuropathomechanics
- Nerve inflammation can lead to mechanosensitivity (sensitivity to mechanical stimuli such as joint movement)
- Mechanosensitivity can produce symptoms
- Differentiating between neuropathomechanics and neuropathophysiology:
- Neuropathomechanics: no pain at rest, movement provokes pain, pain relief with rest
- Neuropathophysiology: pain at rest, movement provokes severe pain, pain persists after rest
Detecting Mechanosensitive Areas
- Palpation: palpating different areas of the nerve to detect mechanosensitivity
- Special tests: ULTT, SLR, Slump test, etc.
- Palpation should be done at least at 2 sites to confirm mechanosensitivity of neural tissue
Basis of Symptoms
- Blood supply to the nervous system
- Axonal transport in the nervous system
- Innervation of connective tissues in the nervous system
- Lattice collagen arrangement in the nervous system
Lattice Collagen Arrangement
- Elongation of the cord stretches longitudinally running vessels and folds transversely running vessels
- Veins in the spinal canal are valveless and allow flow reversibility
- Critical vascular zone from T4 to T9
- Arrest of blood flow at 8% elongation, complete arrest at 15% elongation
Axonal Transport System
- Three flows identified: anterograde flow, retrograde flow, and bidirectional flow
- Flow interruption induces cell body reaction
- Constriction, loss of blood supply, and viruses may impede the flow
Innervation of Nervous System
- Innervation of connective tissues in the nervous system
- Dura mater innervated by segmental, bilateral, and sinuvertebral nerves
- Innervation density varies depending on spinal segment
- Rich innervation in superficial tissues, less in deeper tissues
Clinical Neurobiomechanics
- Mechanical properties of neural tissue: sensitive but not delicate
- Palpation of difficult areas:
- Apply pressure at the carpal tunnel for 30 seconds with 4.5 kg pressure to detect median nerve injury
Neurodynamics as a 3-Part System
- Mechanical interface: the container for the nervous system
- Neural structures: brain, spinal cord, nerve roots, neural plexuses, peripheral nerves, and their connective tissues
- Innervated tissues: connective tissues of the nervous system
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Description
Learn about the susceptible sites in the human body where nerve damage is more likely to occur, such as areas with limited nerve movement and abrupt neural branches.
