Myology Flashcards
Each skeletal muscle is what
An organ
Skeletal muscles functions
Circulation, protective, posture maintenance
Skeletal muscle has what kind of tissue
Dense regular connective
Dense regular connective tissue has what properties
Poor vascularity, protein fibers densly packed, fibers running parallel.
Dense regular connective functions include
Attachment, stabilization, and support.
Dense regular connective locations include
Tendons, ligaments, aponeuroses, and fasciae
An entire muscle is covered in what
Epimysium
Muscle fiber is wrapped in what
Endomysium
Fascicle is wrapped in what
Perimysium
Deep fascia surrounds what
All the ct wrappings
Thin myofilaments
Actin, extends from the z disc to the middle of the sarcomere
Thick myofilaments
Myosin, in the middle of the sarcomere
What does the sarcoplasmic rectilium do
Stores calcium ions and releases them for muscle contraction
Most facial muscles have what
Bony and soft tissue attachments
Epicranius does what
Raises eyebrows, wrinkles forehead
Occipitofrontalis contains what parts
Frontalis and occipital
What does the occipital belly do
Moves the scalp forward/ retracts it
What does the frontal belly do
Elevated forehead and wrinkles the skin of the forehead
What does the epicranial aponeurosis do
Helps make facial expressions
What does the depressor onguli oris do
Depresses the corners of the mouth
What does the buccinator do
Pulls cheeks against teeth when chewing
Platysma function
Tenses skin of the neck and depressed lower lip
Bones of mastication
Mandible, temporal bone, and sphenoid
Muscles of mastication
Masseter, temporalis, medial and lateral pterygoid
What does the masseter do
Elevates and protracts the mandible
What does the temporalis do
Elevates and retracts the mandible
What does the medial and lateral pterygoid do
Elevates and protracts the mandible along with side to side motions
