If brain upper motor neuron dysfunction is suspected, the key test is MRI. Affectionate. One who is afraid of failure. mobile: 'false', The tear causes pain due to irritation of sensory nerves in the disk, and read more ), Spinal cord compression Spinal Cord Compression Various lesions can compress the spinal cord, causing segmental sensory, motor, reflex, and sphincter deficits. Genetic testing can help confirm certain hereditary myopathies. Christina Desmarais puts this so well at Inc.: Just take a look at the bitter people in life. The location of certain lesions correlates with physical findings: Upper motor neuron dysfunction disinhibits lower motor neurons, resulting in increased muscle tone (spasticity) and increased muscle stretch reflexes (hyperreflexia). (b=!0,m=e,setTimeout(function(){y.requireModulesWithModuleBase(a,e,function(){var b=Array.prototype.slice.call(arguments,0);try{h=q.apply(null,b)}catch(e){d(14,a+" -> "+e);return}l.exec([h])})},0)):d(15,a)},getDeps:function(){return!0===b?m:[]},get:function(a){l.add(a)},closeDefine:function(){g=!0;!1===b&&(b=!0,l.exec([void 0]))}}}function K(a){function b(b,e,g){if(0