Anatomy Muscles 3 Flashcards

Terms Definitions
Orbicularis
Circular
Biceps
Two Origins
Sartorius innervation
Femoral nerve
Pronator Quadratus(insertion)
Distal Radius
Teres Major
Location: Back
vastus lateralis
extends the leg
Extensor digitorum
o-lateral epicondylei-phalanges 2-5a-extension
Tensor Fasciae Latae
Location: Leg
hand extensors
extend the hand (posterior)
Adductor longus
o-inf pubic ramusi-linea asperaa-adduction, flex med rot at hip
Pronator teres
ACTION: Pronates forearm
Extensor Digitorum Brevis innervation
Deep peroneal nerve
Fascicle
Discrete bundle of muscle cells, segregated from the rest of the muscle by a connective tissue sheath.
Extensor carpi ulnaris
o-lateral epicondylei-base metacarp 5a-extension, adduction
prime mover of back extension
erector spinae
Sternocleidomastoid
ORIGIN: Manubrium; clavicle INSERTION: Mastoid process ACTION: Contraction of one, rotates head to opposite side
FIRST MUSCLE TO BE PENETRATED WHEN NEEDLING THE UPPER SHOULDER
DELTOID
Superficial Transverse Perineus origin and insertion
origin: Ischial tuberosity; insertion: Central tendon of perineum
G Actin
Globular actin. The actin subunit which bears the active sites to which the myosin heads attach during contraction.
Muscle on outside of lower leg
Peroneus longus
flexor carpi radialis
medial epicondyle humerus

base of second and third metacarpal
Splenius - Description
Broad bipartite superficial muscle (capitis and cervicis parts) extending from upper thoracic vertebrae to skull; capitis portion known as "bandage muscle" because it covers and holds down deeper neck muscles
Gluteus Maximus
ORIGIN: Ilium, posterior superior iliac spine; sacrum INSERTION: Femur, gluteal tuberosity ACTION: Extend femur and rotate laterally
SOMETHING THAT ADDUCTS @ THE WRIST OR FINGER IS LOCATED ON WHICH SIDE?
MEDIAL
Scalenes action
Elevate first two ribs (aid in inspiration); may be important in coughing; flex and rotate neck
Origin
The immovable or less movable bone to which a muscle is attached.
flexes head, rotates head from side to side
sternocleidomastoid
Biceps brachii - Innervation
Musculocutaneous nerve (C5 and C6)
Gluteus medius
ORIGIN: Ilium, posterior surface. INSERTION: Femur, greater tronchanter. ACTION: Abducts and rotates femur medially.
Iliacus action
Iliopsoas is the prime mover of hip flexion; flexes thigh on trunk when pelvis is fixed
Dorsal Interossei origin and insertion
origin: Sides of metatarsals; insertion: Extensor expansion over first phalanx of toes 2-4 on side opposite midaxis of foot (toe 2), but on both sides of toe 2
Muscle of the PharynxSalpingopharyngeus
Action= elevates pharynx and larynx Origin- Auditory tubeInsertion- Pharynx
Sternocleidomastoid - Insertion
mastoid process of temporal bone and superior nuchal line of occipital bone
Dense Regular Connective Tissue: Cells, Matrix, Functions?
Fibroblasts, densely packed collagen fibers with no directionality, little ground substance, functions to resist stretching in all directions (skin)
Hyoglossus origin and insertion
origin: Body and greater horn of hyoid bone; insertion: Inferolateral tongue
int obliques - oia
o: lumbar fascia, iliac crest and inguinal lig i: linea alba, pubic crest last ribs 3-4 and coastal margin a: bilat contraction - assists rectus unilat: ipsilat trunk rot and lat flex
Flexor Hallucis Brevis origin and insertion
origin: Mostly from cuboid bone; insertion: Via two tendons onto both sides of the base of the proximal phalanx of big toe; each tendon has a sesamoid bone in it
Splenius - Bilateral Action
acts as a group to extend or hyperextend head
postural problems created by two imbalanced muscle tone states
hypertonic - too much tone; hypotonic - not enough tone
posterior scalene, p 343 o. i, a
O: TP C5- 7 I : 2nd rib A: same as anterior and middle
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