Classification of Skeletal Muscles Quiz

Study Notes

Action of the Muscle: Represents the function a muscle performs. Example includes the Flexor digitorum superficialis, which flexes the fingers.
Shape of the Muscle: Refers to the overall form of the muscle. An example is the Deltoid, which has a triangular shape resembling the Greek letter delta (Δ).
Location of Origin and/or Insertion: Describes where a muscle begins and attaches. Notable examples are Pectoralis major, which is located in the chest, and Biceps brachii, found in the upper arm.
Number of Origins: Indicates how many points a muscle has where it originates. The Biceps brachii has two origins, which is reflected in its name ("bi" means two).
Location Relative to a Bone or Body Region: Identifies where the muscle is situated in relation to other structures. For instance, Erector spinae runs along the spine, while Abdominis transversus is located in the abdominal region, and External intercostals are found between the ribs.
Direction of Muscle Fibers: Describes how fibers align in relation to a reference line. For example, Rectus abdominis fibers run vertically, while Abdominis transversus fibers run horizontally.
Relative Size of the Muscle: Refers to the muscle's dimensions in comparison to others. The Pectoralis major is known for being one of the larger muscles in the chest area.