Fine motor skill is the coordination of small muscle movements which occur in body parts such as the fingers, usually in coordination with the eyes. In relation to motor skills of hands and fingers, the term dexterity is commonly used. When applied to the theory of human aptitude, this is called "manual dexterity". The high level of manual dexterity that humans exhibit can be attributed to the manner in which manual tasks are controlled by the nervous system.

Hand movements are initiated by commands originating from a region of the primary motor cortex that contain a high number of specialized corticospinal (CST) neurons, termed corticomotoneuronal (CM) cells. CM cells descend into the spinal cord to form monosynaptic connections with motor neurons in the anterior horn. Research has shown that these monosynaptic connections may account for the high amount of manual dexterity observed in primates, including humans.

Many tests have been developed in order to assess fine motor skills. Among them include force matching tasks. Humans exhibit a high degree of accuracy in force matching tasks where an individual is instructed to match a reference force applied to a finger with the same or different finger. Humans also exhibit a high degree of accuracy during grip force matching tasks. These aspects of manual dexterity are apparent in the ability for humans to effectively use tools.

Charles Parker, Jr. (August 29, 1920 – March 12, 1955), also known as Yardbird and Bird, was an American jazz saxophonist and composer.

Parker acquired the nickname "Yardbird" early in his career and the shortened form, "Bird", which continued to be used for the rest of his life, inspiring the titles of a number of Parker compositions, such as "Yardbird Suite", "Ornithology", "Bird Gets the Worm", and "Bird of Paradise."

Parker was a highly influential jazz soloist and a leading figure in the development of bebop, a form of jazz characterized by fast tempos, virtuosic technique, and improvisation. Parker introduced revolutionary harmonic ideas, including rapidly passing chords, new variants of altered chords, and chord substitutions. His tone ranged from clean and penetrating to sweet and somber. Many Parker recordings demonstrate virtuosic technique and complex melodic lines, combining jazz with other musical genres, including blues, Latin, and classical.

Parker was an icon for the hipster subculture and later the Beat Generation, personifying the jazz musician as an uncompromising artist and intellectual, rather than an entertainer.

Paul Laurence Dunbar Chambers, Jr. (April 22, 1935 – January 4, 1969) was a jazz bassist. A fixture of rhythm sections during the 1950s and 1960s, his importance in the development of jazz bass can be measured not only by the length and breadth of his work in this short period but also his impeccable time, intonation, and virtuosic improvisations.

Born in Pittsburgh, Pennsylvania on April 22, 1935, Chambers was raised in Detroit, Michigan following the death of his mother. He began playing music with several of his schoolmates; the baritone horn was his first instrument. Later he took up the tuba. "I got along pretty well, but it's quite a job to carry it around in those long parades, and I didn't like the instrument that much." Chambers became a string bassist around 1949. His formal bass training got going in earnest in 1952, when he began taking lessons with a bassist in the Detroit Symphony Orchestra. Chambers did some classical work himself, with a group called the Detroit String Band that was, in effect, a rehearsal symphony orchestra. Studying at Cass Technical High School off and on from 1952 to 1955, he played in Cass' own symphony, and in various other student groups, one of which had him playing baritone saxophone. By the time he left for New York at the invitation of tenor saxophonist Paul Quinichette, he had absorbed a working knowledge of many instruments.

Armando Anthony "Chick" Corea (born June 12, 1941) is an American jazz pianist, keyboardist, and composer.

Many of his compositions are considered jazz standards. As a member of Miles Davis' band in the 1960s, he participated in the birth of the electric jazz fusion movement. In the 1970s he formed Return to Forever. Along with Herbie Hancock, McCoy Tyner and Keith Jarrett, he has been described as one of the major jazz piano voices to emerge in the post-John Coltrane era.

His career has been driven by his will to operate as a free agent and compulsively explore different avenues of music making. This hunger has positioned him as an important catalyst in the world of serious, mainstream acoustic jazz, and he is one of the most influential and widely studied figures in the last 40 years.

Corea continued to pursue other collaborations and to explore various musical styles throughout the 1980s and 1990s. He is also known for promoting and fundraising for a number of social issues, such as eradicating social illiteracy, and is a Scientologist.

John Lenwood (Jackie) McLean (May 17, 1931 – March 31, 2006) was an American jazz alto saxophonist, composer, bandleader, educator, and is a member of the DownBeat Hall of Fame, born in New York City.

McLean's father, John Sr., played guitar in Tiny Bradshaw's orchestra. After his father's death in 1939, Jackie's musical education was continued by his godfather, his record-store-owning stepfather, and several noted teachers. He also received informal tutoring from neighbors Thelonious Monk, Bud Powell, and Charlie Parker. During high school he played in a band with Kenny Drew, Sonny Rollins, and Andy Kirk Jr. (the tenor saxophonist son of Andy Kirk).

Along with Rollins, he played on Miles Davis' Dig album, when he was 19 years old. As a young man McLean also recorded with Gene Ammons, Charles Mingus on the seminal Pithecanthropus Erectus, George Wallington, and as a member of Art Blakey's Jazz Messengers. McLean joined Blakey after reportedly being punched by the volatile Mingus. Fearing for his life, McLean pulled out a knife and contemplated using it against Mingus in self-defense. He later stated that he was grateful that he did not stab the bassist.