Publications by authors named "Nicole Morrissey"

Objective: The purpose of this study was to examine the intrarater reliability and criterion validity of a digital goniometer for measuring cervical range of motion including an active sitting version of the cervical flexion rotation test, an important clinical measure for capturing upper cervical dysfunction.

Methods: A cross-sectional study (n = 18; 78% women) examined total cervical and upper cervical active ranges of motion (flexion, extension, side bending, rotation) measured concurrently using 3 measurement methods (a digital goniometer, the cervical range-of-motion instrument, and 3-dimensional motion analysis). Intraclass correlation coefficient (2,1), Pearson correlation coefficients (digital goniometer versus 3-dimensional motion analysis), and minimum detectable change were calculated.

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Background: The part played by oxytocin and oxytocin neurons in the regulation of food intake is controversial. There is much pharmacological data to support a role for oxytocin notably in regulating sugar consumption, however, several recent experiments have questioned the importance of oxytocin neurons themselves.

Methods: Here we use a combination of histological and chemogenetic techniques to investigate the selective activation or inhibition of oxytocin neurons in the hypothalamic paraventricular nucleus (Oxt).

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Changes in mitochondrial function in a variety of cells/tissues are critical for orchestrating systemic energy homeostasis and are linked to the development of obesity and many of its comorbidities. The mitochondrial translocator protein of 18 kDa (TSPO) is expressed in organs throughout the body, including the brain, liver, adipose tissue, gonads and adrenal glands, where it is implicated in regulating steroidogenesis and cellular metabolism. Prior work from our group and others has shown that, in rodents, TSPO levels are altered in adipose tissue by obesity and that modulation of TSPO activity may impact systemic glucose homeostasis.

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Chronic low-grade inflammation is a feature of the pathophysiology of obesity and diabetes in the CNS as well as peripheral tissues. Glial cells are critical mediators of the response to inflammation in the brain. Key features of glia include their metabolic flexibility, sensitivity to changes in the CNS microenvironment, and ability to rapidly adapt their function accordingly.

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A class of glial cell, astrocytes, is highly abundant in the central nervous system (CNS). In addition to maintaining tissue homeostasis, astrocytes regulate neuronal communication and synaptic plasticity. There is an ever-increasing appreciation that astrocytes are involved in the regulation of physiology and behaviour in normal and pathological states, including within neuroendocrine systems.

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