Flashcards in Muscle Mechanics and Control Deck (88)
Outermost tissue of skeletal muscle, forms the overcoat of the muscle and helps to separate it from other muscles
Continues past the fleshy part of muscle to help form its attachment to the bone
Within each skeletal muscle, surrounds a group of muscle fibers or muscles cells which are held together.
Each group of muscle fibers or cells that is wrapped by the perimysium
Within each fascicle are
Connective tissue which surrounds muscle fibers and goes between each one within fascicles
Connective tissue sheets also provide entry and exit routes for blood vessels and nerve fibers that serve the muscle, these bloods vessels and fibers are called
Important for the activity of skeletal muscle because skeletal muscle is completely dependent upon the nerves, aka innervation
Neurovascular Bundle (Nerve Supply)
Normally a muscle is supplied by one nerve, which may supply only one, two, or several muscles?
T/F: Skeletal muscle tissues is striated
Endomysium, Perimysium, and Epimysium form these 4 types of muscle attachments
Extensions of connective tissue sheaths, forming a cord like attachment to outer covering of bone, periostium
Tendons are usually marked by what structure on bone?
Type of attachment that is a broad sheet of connective tissue for the attachment of a muscle
Attaches and forms a ridge like or line on skeletal structure it attaches to, but may also attach do dermis of skin
Muscle fibers continue almost to the bone, there is very little connective tissue.
Fleshy attachments occur where bone is like this, because the forces are widely distributed along attachment site, rather than one location
Muscle fibers attach to the connective tissue of the dermis of the skin (like muscles of facial expression)
Gives the shape to muscles
The strength of muscle and direction in which the pulled are determined by the orientation of...
A feather shaped type of muscle fibers
All muscles attach from one side
All muscles attach from two sides
Shaped like a bunch of feathers converged on a single point
Arranged diagonally causes slight reduction of force, but more fibers meaning more cross sectional area and overall greater strength
Fan shaped fibers, broad origin and narrow insertion. Strong because fascicles exert tension on relatively small insertion
Sphincter forming rings around body openings
Thick in the middle and taper on both ends, forming a belly in the middle. Contractions are moderately strong.
Long straplike muscles of uniform width and parallel fasicles. Small cross section. Spread over long distances and shorten more, but small cross section.
What gives muscles their strength
Cross sectional area