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Ch 11 MUS of Body

Anatomy Chapter 11

Naming Skeletal Muscles: Location -Some muscle's names indicate the bone or body region with which the muscle is associated -TEMPORALIS MUSCLE- overlies the temporal bone -INTERCOSTAL MUSCLES run between the ribs
Naming Skeletal Muscles: Relative Size Compare to each other: -Vastus- huge -Maximus- large -Longus- long -Minimus- small
Naming of Skeletal Muscles: Number of origins -Attachment of fixed (immovable) part of muscle -Biceps- two heads (origins) -Triceps- three heads -Quadriceps- four heads
Naming Skeletal Muscles: Shape -Different geometric shapes -Deltoid -Rhomboid -Latissimus -Teres -Trapezius
Naming Skeletal Muscles: Direction of Fibers -Tell how muscle fibers run -rectus- fibers run straight/ parallel to the the midline of the body -Transversus- Transverse/across -Oblique- fibers run at diagnol angles to an imaginary defined axis -Orvicularis- circular
Naming Skeletal Muscles: Location of attachments -Named according to point of origin and insertion -Origin always named first -Stemocleidomastoid -Origin on the sternum and clavicle -Insertion on the mastoid process -Brachioradialis -Origin on the brachium, arm -Insertion o
Naming Skeletal Muscles: Action -Action words: flexor, extensor, or adductor apppear in muscle's name -Abductor- to abduct structure -Adductor- to adduct structure -Flexor- to flex structure -Extensor- to extend structure -Levator- to lift or elevate structure -Masseter- to
Extrinsic Tongue Muscles 1. Genioglossus 2. Hyoglossus 3. Styloglossus
Deep Back Muscles 1. Quadratus Lamborum 2. Semispinalis 3. Erector Spinae 4. Longismus 5. Spinalis
Extrinsinc Tongue Muscles are innervated by cranial Nerve cranial nerve XII Hypoglossal
Created by: vs604