Anatomy: Muscles Flashcards

Terms Definitions
Platys
Flat
flexes forearm
brachialis
Masseter
Location: Face
Extensor Digitorum(innervation)
Radial nerve
Lateral Malleolus
Location: Leg
vastus intermedius
extends the leg
Semitendinosus
o-ishial tuberosityi-post medial condylea-flex knee; extension med rot
Orbicularis Oris
Muscle Surrounding the Mouth.
Isotonic contractions
-"same tone"-when muscles shorten
Brachioradialis
o-sup to lateral epicondylei-radial styloid processa-flexion at elbow
coracobrachialis
flexes humerus, antagonist of supraspinatus
Peroneus Tertius action
Dorsiflexes and everts foot
Contraction
The activation of myosin's cross bridges, which are the force-generating sites.Shortening occurs when the tension generated by the cross bridges on the thin filaments exceeds the forces opposing shortening.
Biceps brachii, short head
o-coracoid processi-radial tuberositya-flexion, supination
Teres major
ACTION: Medially rotates humerus
FUNCTION OF THE MEDIAL PTERYGOID
CLOSES THE JAW
Occipitalis action
Fixes aponeurosis and pulls scalp posteriorly
gastrocnemius
plantar flexes the foot and flexes the leg
Muscle on inside of upper arm
Biceps brachii
supraspinatus
o - supraspinous fossa of scapula

i - greater tubercle of humerus

helps deltoid abduct arm at shoulder
Masseter - Insertion
angle and ramus of mandible
longissimus capitus
helps maintain posture, extends head and rotates face/head to same side
THE STYOGLOSSUS DOES WHAT?
ELEVATES AND RETRACTS THE TONGUE
Scalenes origin and insertion
origin: Transverse processes of cervical vertebrae; insertion: Anterolaterally on first two ribs
Cardiac Muscle Tissue
Striated muscle of the heart responsible for non-voluntary contractions at a relatively steady rate.
elevates and adducts scapula and rotates it downward, stabilizes scapula
rhomboid major/rhomboid minor
Scalenes - Description
located more laterally than anteriorly on neck; deep to platysma and sternocleidomastoid
Iliopsoas
In groin, formed by union of the Iliacus and psoas major.
MUSCLES OF THE MEDIAL THIGH
1. PECTINEUS2. ADDUCTOR BREVIS3. ADDUCTOR LONGUS4. ADDUCTOR MAGNUS5. GRACILIS
Bulbospongiosus origin and insertion
origin: Central tendon of perineum and midline raphe of male penis; insertion: Anteriorly into corpus cavernosa of penis or clitoris
Muscle of mastication "Chewing"Lateral pterygoid pterygoid= winglike
Action= protracts mandible; prodices side-to-side movement of mandible
Splenius - Insertion
capitis - mastoid process of temporal bone and occipital bone; cervicis - transvers processes of C2-C4
Dense Regular Connective Tissue: Cells, Matrix, Functions?
Fibroblasts, densely packed collagen fibers and little ground substance, provide tensile strength (tendons and ligaments)
Vastus Intermedius origin and insertion
origin: Anterior and lateral surfaces of proximal femur shaft; insertion: As for rectus femoris
iliocostalis, i o a
o: lumborum - iliac crest and thoracolumbar fascial, i: tp c4-6, a: extend spine and maintain posture, ipsilat flex
External Oblique origin and insertion
origin: By fleshy strips from outer surfaces of lower eight ribs; insertion: Most fibers into linea alba; some into pubic crest and tubercle and iliac crest; majority of fibers insert anteriorly via a broad aponeurosis
semispinalis o,i,a
o: tps of c7-t12, i: spd of thoracic and cervial, ociput a: extends spine
Attachment: names of two types of places of attachment
origin and insertion (usually the more movable bone)
middle scalene p 343 o, i, a
O: TP C2 - 7, I: 1st rib A: same as anterior
Maximus
Largest
Soleus
Location: Leg
Popliteus innervation
Tibial nerve
Muscle on jaw
Masseter
Posteroanterior
From back to front.
triceps surae
gastrocnemius and soleus
Muscle around lips
Orbicularis oris
WHICH MUSCLE CREATES A FROWN?
CORRUGATOR
temporalis
elevates and retracts the mandible
Muscle on inside of thigh
Gracilis
Columnar
Tall narrow, intestine, (absorption and secretion of mucus)
orbicularis oris
puckers mouth as in kissing
shoulder girdle
origin-acromium process, spine of scapulainsertion
Muscle directly lateral to tibia
Tibialis anterior
Supinator
Turns the palms superiorly or anteriorly
Asquamous
Flat, intestine, (fast diffusion of substances through tissue
Lumbricals action
By pulling on extensor expansion, flex toes at metatarsophalangeal joints and extend toes at interphalangeal joints
Anaerobic Respiration
-does not use oxygen, uses glycolysis-produces anaerobic glycolysis when muscle action is too intense for them to keep up
Glycosomes
Granules of stored glycogen in muscle cells.
extends, adducts, and medially rotates arm(if arm is elevated over head, it brings it down)
latissimus dorsi
3 types of muscle tissue
skeletal, cardiac, smooth
A muscle fiber (myofiber) is a muscle
cell
Gracilis
ORIGIN: Pubis, inferior ramus. INSERTION: Tibia, proximal medial surface. ACTION: Adducts thigh
Psoas Major action
As above; also affects lateral flexion of vertebral column; important postural muscles
Deep Transverse Perineus action
Supports pelvic organs; steadies central tendon
Synovial Joint (freely moveable)--Articular Capsule (outer layer)
Fibrous Capsule (outer layer)Dense irregular connective tissue that prevents dislocation but allows for movement. Parallel bundles of these fibers form ligaments.
Muscle of mastication "Chewing"Terporalistempora= pertaiging to temporal bone
Action- Elevates and retracts mandible
A _____ is the functional unit of muscle contraction
sarcomere
Shapes of Epithelial Tissue
Asquamous, cuboidal , columnar, Pseudostratified, Stratified squamous, Stratified cuboidal, and Transitional epithelium
Tibialis Posterior origin and insertion
origin: Extensive origin from superior tibia and fibula and interosseous membrane; insertion: Tendon passes behind medial malleolus and under arch of foot; inserts into several tarsals and metatarsals 2-4
What type of filament is pulled out of the way, exposig binding sites in Actin?
Tropomyosin
MouthLevator anguli orisleva= raise
Action- draes corners of mouth sieriorly and laterally "smile" muscleInnervation- CN VII (facial nerve)
filamentary
pertaining to or of the nature of a filament.
Levator Labii Superioris
The muscle above the lip that is responible for lifting the lip.
Levator Labii Superioris action
Opens lips; raises and furrows the upper lip; flares nostril (as in disgust)
internal intercostals p 347
deeper layer that aids in forced expiration
Plantar Interossei origin and insertion
origin: The side of each metatarsal that faces the midaxis of the foot (metatarsal 3, where it’s absent); insertion: Extensor expansion on first phalanx of each toe (except toe 2), on side facing midaxis of foot
THE LEVATOR PALPEBRAE SUPERIORIS DOES WHAT?
OPENS THE EYE - 3RD CRANIAL NERVE
what protein is involved in contraction?
myosin (cross bridges act as motors to generate tension for contraction)
/ 78
Term:
Definition:
Definition:

Leave a Comment ({[ getComments().length ]})

Comments ({[ getComments().length ]})

{[comment.username]}

{[ comment.comment ]}

View All {[ getComments().length ]} Comments
Ask a homework question - tutors are online