The mechanical motions of the body segments necessary to accomplish a task are skillfully controlled by a myriad of neuromuscular components and a series of well-orchestrated neural events encompassing both the central and peripheral nervous systems. Some of these issues are discussed in the following sections of this chapter. The maintenance of ergonomically efficient posture requires the optimal orientation of various interconnected human body segments to produce minimal biomechanical loadings of the joints. The neural components of movements are the planning and programming 'Units and the performance units. Planning and programming are the functions of the precortical centers (cerebral cortex. bilateral movement). the basal ganglia. the cerebellum. and the thalamus. The premotor and sensory regions provide the input for planning to the basal ganglia and the cerebellum. The performance units include the motor cortex and spinal cord. with the smoothing function performed by the cerebellum. In order for a person to perform a motor act smoothly. all the somatosensory systems have to work in harmony to help provide "accurate" information regarding the position of body segments. muscle tensions. and joint motions to the higher centers.
We take your privacy seriously. You can review and change the way we collect information below.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
Cookies used to make website functionality more relevant to you. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests.
Cookies used to track the effectiveness of CDC public health campaigns through clickthrough data.
Cookies used to enable you to share pages and content that you find interesting on CDC.gov through third party social networking and other websites. These cookies may also be used for advertising purposes by these third parties.