An in depth look at 'Motor Skills.'
A motor skill is an intentional movement involving a motor or muscular component, that must be learned and voluntarily produced to proficiently perform a goal-oriented task, according to Knapp, Newell, and Sparrow.
Development of motor skills Due to the immaturity of the human nervous system at the time of birth, children grow continually throughout their childhood years. Many factors contribute to the ability and the rate that children develop their motor skills. Uncontrollable factors include: genetic or inherited traits and children with learning disorders. A child born to short and overweight parents is much less likely to be an athlete than a child born to two athletically built parents. Controllable factors include: the environment/society and culture they are born to. A child born in the city is much less likely to have the same opportunities to explore, hike, or trek the outdoors than one born in the rural area. For a child to successfully develop motor skills, he or she must receive many opportunities to physically explore the surroundings. 6 months – can sit straight 12 months – takes first steps 24 months – can jump 36 months – can cut with scissors; runs on toes Influences on development Stress and arousal: stress and anxiety is the result of an imbalance between demand and the capacity of the individual. Arousal is the state of interest in the skill. The optimal performance level is moderate stress or arousal. An example of too low of arousal state is an overqualified worker performing repetitive jobs. AN example of stress level too high is an anxious pianist at a recital. Stages of motor learning The stages to motor learning are the cognitive phase, the associative phase, and the autonomous phase. Cognitive Phase: When a learner is new to a specific task, the primary thought process starts with, “what needs to be done?” Considerable cognitive activity is required so that the learner can determine appropriate strategies to adequately reflect the desired goal. Good strategies are retained and inefficient strategies are discarded. The performance is greatly improved in a short amount of time. Associative Phase: the learner has determined the most effective way to do the task and starts to make subtle adjustments in performance. Improvements are more gradual and movements become more consistent. This phase can last for a long time. The skills in this phase are fluent, efficient and aesthetically pleasing. Autonomous Phase: this phase may take several months to years to reach. The phase is dubbed “autonomous” because the performer can now “automatically” complete the task without having to pay any attention to performing it. Examples include walking and talking or sight reading while doing simple arithmetic.
The Law of Effect Motor skill acquisition has long been defined in the scientific community as an energy-intensive form of stimulus-response learning that results in robust neuronal modifications. In 1898, Thorndike proposed the law of effect, which states that, the association between some action and some environmental condition is enhanced when the action is followed by a satisfying outcome. For instance, if an infant motions his right hand and left leg in just the right way, he can perform a crawling motion, thereby producing the satisfying outcome of increasing his mobility. Because of the satisfying outcome, association between being on all fours and these particular arm and leg motions are enhanced. Further, a dissatisfying outcome weakens the S-R association. For instance, when a toddler contracts certain muscles, resulting in a painful fall, the child will decrease the association between these muscle contractions and the environmental condition of standing on two feet.
Feedback During the learning process of a motor skill, feedback is the positive or negative response that tells the learner how well the task was completed. Inherent feedback: after completing the skill, inherent feedback is the sensory information that tells the learner how well the task was completed. A basketball player will note that he or she made a mistake when the ball misses the hoop. Another example is a diver knowing that a mistake was made when the entrance into the water is painful and undesirable. Augmented feedback: in contrast to inherent feedback, augmented feedback is information that supplements or “augments” the inherent feedback. For example, when a person is driving over a speed limit and is pulled over by the police. Although the car did not do any harm, the policeman gives augmented feedback to the driver in order for him to drive more safely. Another example is a private tutor for a new student of a field of study. Augmented feedback decreases the amount of time to master the motor skill and increases the performance level of the prospect. Transfer of motor skills: the gain or loss in the capability for performance in one task as a result of practice and experience on some other task. An example would be the comparison of initial skill of a tennis player and non-tennis player when playing table tennis for the first time. An example of a negative transfer is if it takes longer for a typist to adjust to a randomly assigned letters of the keyboard compared to a new typist. Fine motor skills Fine motor skill requires the use of smaller muscle groups to perform tasks that are precise in nature. Activities like playing the piano and playing video games are examples of using fine motor skills. Generally, there is a retention loss of fine motor skills over a period of non-use. Discrete tasks usually require more fine motor skill than gross motor skills. Men and women are found to have similar fine motor skills when controlling for finger size. Gender differences in brain physiology are often cited by scientists to explain these differences. Many of the regions of the brain responsible for motor skill reside in the frontal lobe, basal ganglia, and cerebellum. The regions of the frontal lobe responsible for motor skill include the primary motor cortex, the supplemental motor area and the premotor cortex. The primary motor cortex is located on the precentral gyrus and is often visualized as the motor homunculus. By stimulating certain areas of the motor strip and observing where it had an effect, Penfield and Rassmussen were able to map out the motor homunculus. Areas on the body that have complex movements, such as the hands, have a bigger representation on the motor homunculus. The supplemental motor area, which is just anterior to the primary motor cortex, is involved with postural stability and adjustment as well as coordinating sequences of movement. The premotor cortex, which is just below the supplemental motor area, integrates sensory information from the posterior parietal cortex and is involved with sensory guided planning of movement and begins the programming of movement. The basal ganglia are an area in the brain where gender differences in brain physiology is evident. The basal ganglia are a group of nuclei in the brain that are responsible for a variety of functions, some of which include movement. The globus pallidus and putamen are two nuclei of the basal ganglia which are both involved in motor skills. The globus pallidus is involved with voluntary motor movement, while the putamen is involved with motor learning. Even after controlling for the naturally larger volume of the male brain, it was found that males have a larger volume of both the globus pallidus and putamen. The cerebellum is an additional area of the brain important for motor skills. The cerebellum controls fine motor skills as well as balance and coordination. Although women tend to have better fine motor skills, the cerebellum has a larger volume in males than in females, even after correcting for that fact that males naturally have a larger brain volume. Hormones are an additional factor that contributes to gender differences in motor skill. For instance, women perform better on manual dexterity tasks during times of high estradiol and progesterone levels, as opposed to when these hormones are low such as during menstruation. An evolutionary perspective is sometimes drawn upon to explain how gender differences in motor skills may have developed, although this approach is controversial. For instance, it has been suggested that men were the hunters and provided food for the family, while women stayed at home taking care of the children and doing domestic work. Some theories of human development suggest that men's tasks involved gross motor skill such as chasing after prey, throwing spears and fighting. Women on the other hand used their fine motor skills the most in order to handle domestic tools and accomplish other tasks that required fine motor control.