Question explored with the scientific record
Is FND related to nerves damage
The short version: the evidence you were given does not answer whether FND involves nerve damage, because none of the retrieved studies tested that question.
The records you received cover a scatter of unrelated topics: peripheral nerve injury in rats [1], sweat gland innervation [2], a drug trial for post-surgical nerve recovery [3], a case of cranial nerve palsy after anesthesia [4], a study on aging-related nerve regeneration [5], autonomic testing in pelvic pain [6], thyroid hormone transport in the brain [7], a Parkinson's drug in monkeys [8], methamphetamine addiction and dopamine receptors [9], BDNF in diabetes [10], acupuncture brain mapping [11], a fly model of dyskinesia [12], myelin basic protein structure [13], prefrontal cortex connectivity [14], a GABA receptor assay [15], and sodium channel lithium selectivity [16]. Not one of them examines functional neurologic disorder or compares structural nerve damage to functional symptoms.
FND is defined as a condition where symptoms like weakness, tremor, or seizures are real but not explained by structural nerve injury or disease. The central question is whether FND involves microscopic or functional nerve changes that standard tests miss. The retrieved literature does not touch that debate. It does not include a single study of FND patients, a comparison of nerve conduction or imaging in FND versus neuropathy, or a mechanistic account linking FND to nerve damage.
The absence of relevant evidence in this retrieval does not mean the question is settled. Outside these records, the literature on FND is divided. Some researchers argue that FND involves altered brain network function without structural nerve loss. Others point to subtle inflammatory or metabolic changes that could affect nerve signaling. But the records you were given cannot inform that discussion.
My call: the retrieved evidence does not address whether FND is related to nerve damage. Confidence: not clear from this retrieval.
Sources used 16
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Ipsilateral cortical fMRI responses after peripheral nerve damage in rats reflect increased interneuron activity
This study investigates the bilateral fMRI responses in the primary somatosensory cortex of rats following unilateral peripheral nerve injury, revealing that increased responses in the deprived cortex are primarily due to heightened activity of interneurons rather than pyramidal…
DOI: 10.1073/pnas.0903153106 -
Rodent eccrine sweat glands: A case of multiple efferent innervation
This study investigates the multiple innervation of eccrine sweat glands in the hind-paw of mice, revealing that sweat glands receive input from various peripheral nerves, which has implications for understanding the sympathetic nervous system's neuropathology.
DOI: 10.1016/0306-4522(84)90057-5 -
4-Aminopyridine treatment for nerve injury resulting from radical retro-pubic prostatectomy: a single-center double-blind, randomized, placebo-controlled study
A single-center, double-blind, randomized, placebo-controlled trial to test whether dalfampridine (4-aminopyridine) accelerates recovery of erectile function and continence after nerve-sparing radical prostatectomy in men with organ-confined prostate cancer.
DOI: 10.1186/s13063-024-08102-z -
Recurrent aspiration pneumonia due to bilateral associated laryngeal paralysis after tooth extraction under general anesthesia: a case report
A case report describes a patient who developed simultaneous paralysis of the glossopharyngeal, vagus, and hypoglossal nerves after general anesthesia; CT/MRI showed no central nervous system involvement, and nerve function recovered in approximately 6 months.
DOI: 10.1186/s40981-020-00335-6 -
Endothelin B receptor inhibition rescues aging-dependent neuronal regenerative decline
ETBR inhibition by Bosentan rescues aging-related decline in DRG axon regeneration, promoting axon growth after injury by upregulating connexin 43 in satellite glial cells and revealing a neuron–glia–vascular signaling axis as a therapeutic target for nerve repair in aging.
DOI: 10.7554/elife.100217 -
Autonomic Testing in Women with Chronic Pelvic Pain
This study investigates the autonomic nervous system's role in chronic pelvic pain disorders, revealing that while interstitial cystitis/bladder pain syndrome (IC/BPS) shows less autonomic neuropathy compared to myofascial pelvic pain (MPP), both conditions exhibit significant o…
DOI: 10.1016/j.juro.2016.03.142 -
The Monocarboxylate Transporter 8 Linked to Human Psychomotor Retardation Is Highly Expressed in Thyroid Hormone-Sensitive Neuron Populations
This study investigates the expression of the monocarboxylate transporter 8 (MCT8) in the central nervous system of mice, revealing its significant role in thyroid hormone transport and implications for brain development, particularly in relation to psychomotor retardation obser…
DOI: 10.1210/en.2004-1179 -
Preladenant, a selective A2A receptor antagonist, is active in primate models of movement disorders
Preladenant, a selective A2A receptor antagonist, improves motor function in MPTP-treated monkeys and delays extrapyramidal syndrome onset in haloperidol-treated monkeys without evoking dyskinesia.
DOI: 10.1016/j.expneurol.2010.07.011 -
A serum-based insight into dopaminergic dysregulation and mesocorticolimbic network imbalance in methamphetamine addiction
Chronic methamphetamine abuse is associated with decreased serum D2 receptor levels and weaker right orbitofrontal cortex–amygdala coherence, with serum D2R inversely related to this connectivity, suggesting a peripheral biomarker of central dopaminergic dysfunction.
DOI: 10.1186/s43045-025-00597-9 -
Association of Serum BDNF with Severity of Cognitive Disorders in Patients with Type 2 Diabetes
In Russian adults with type 2 diabetes and cognitive impairment, serum BDNF levels are reduced compared with healthy controls and show significant inverse associations with diabetes duration and HbA1c, while positively correlating with several cognitive-function tests, suggestin…
DOI: 10.52667/2712-9179-2022-2-2-67-77 -
Simultaneous CBF and BOLD mapping of high frequency acupuncture induced brain activity
This study uses simultaneous cerebral blood flow (CBF) and BOLD fMRI to map brain responses to high-frequency electroacupuncture at LI4 (Hegu), comparing it with minimal stimulation to reveal central effects involving subcortical and limbic regions, with the two imaging modaliti…
DOI: 10.1016/j.neulet.2012.09.050 -
Impaired Pre‐Motor Circuit Activity and Movement in a Drosophila Model of KCNMA1 ‐Linked Dyskinesia
The study creates a Drosophila knock-in model of the human KCNMA1 D434G dyskinesia GOF mutation (SLO E366G) to show that BK channel GOF narrows action potentials, reduces Ca2+-dependent neurotransmitter release at low Ca2+, disrupts larval pre-motor circuit activity, impairs loc…
DOI: 10.1002/mds.28479 -
Circular dichroic analysis of the secondary structure of myelin basic protein and derived peptides bound to detergents and to lipid vesicles
This study investigates the conformational changes of bovine myelin basic protein when bound to lipid bilayers and detergents, revealing significant hydrophobic interactions and structural transitions that may relate to its function in neurological disorders.
DOI: 10.1016/0005-2795(79)90169-7 -
Resting-state functional connectivity in prefrontal cortex investigated by functional near-infrared spectroscopy: A longitudinal and cross-sectional study
This study investigates the stability of resting-state functional connectivity (RSFC) in the prefrontal cortex using functional near-infrared spectroscopy (fNIRS) through both longitudinal and cross-sectional approaches, finding no significant variation over time in healthy adul…
DOI: 10.1016/j.neulet.2018.06.034 -
A High-Throughput Functional Assay for Characterization of γ -Aminobutyric Acid A Channel Modulators Using Cryopreserved Transiently Transfected Cells
This study presents a high-throughput functional assay using cryopreserved transiently transfected HEK293 cells to characterize GABAA receptor modulators, demonstrating its utility for drug discovery in neurological and psychiatric disorders.
DOI: 10.1089/adt.2008.161 -
Structure-function analysis of lithium-ion selectivity of voltage-gated sodium channel
This study investigates the molecular basis of lithium-ion selectivity in voltage-gated sodium channels by creating BacNav mutants with enhanced Li+ selectivity through site-directed mutagenesis, revealing critical structural determinants for ion permeation and potential implica…
DOI: 10.1101/2025.05.26.656081