Axial Musculature Flashcards
What type of tissue adds to muscles
Connective tissues
Endomysium
Wraps cell
Perimysium
Wraps fascicle- bundle of fiber
Epimysium
Wraps muscle
Fascia
Wraps muscle group
Fascicle and muscles shape
7 types
Strength of a muscle and the direction of its pull are partly determined by the orientation of its fascicles
Parallel muscles
Uninform width, fascicles aligned with all of them in a the same direction
Fusiform muscles
Thick in the middle, tapered at the ends like biceps
Triangular muscles
Broad at one end and narrow at the other end
Muscles groups and compartments
Compartments are enclosed by fascia which wraps around muscles to create the intermuscular septa
Pennate muscles 3 kind
Feather-shaped
Unipennate, bipennate and multipennate
Circular muscles
Form rings around body like eyes and mouth
Muscle contraction
Isotonic changing the muscle length by eccentric extension or concentric flexion
Isometric muscle contracts but size doesn’t change
First class lever
Seesaw
Fulcrum at the middle
Third class lever
Flexing a muscle, rowing a boat
Effort is at the middle
Second class lever
Pulling something or standing on tippy toes
Load in the middle
Intrinsic Muscles
Muscles contained within a region like the hand
Upper limbs
Anterior and posterior compartments
Lower limbs
Anterior, Posterior, medial, and lateral compartments.
Direct fleshy attachment
Close association with bones, connect to collagen fibers
Extrinsic Muscles
Muscles that move the specific region but are found outside of the region like the forearm moving the hand
Indirect attachment
Tendon attaches muscles to bone, connects into periosteum and matrix
Aponeurosis
Broad sheet of tendon that can attach to tissues other than bones
Synergist
Prevents unwanted movement in an intermediate joint crossed by prime mover
Aids the prime mover
Prime mover
Produces the main action, chief muscle
Antagonist
Opposes the action of the prime mover and must be relaxed before the contraction of prime mover
Fixator
Prevents bone movement by its concentration does not produce movement by itself but helps prime mover
Large muscles
Major or Maximus
Small muscle
Minor or minimums
Broad muscle
Latissimus
Long muscle
Longus
Short muscle
Brevis
Depth of muscle
Superficialis
Profundus
Externus
Shape
Deltoid- triangular
Teres- rounded
Rectus- straight
Number of head
Biceps- 2 heads
triceps- 3 head
quadriceps- 4 heads
Sternocleidomastoid
Origin is the sternum and the clavicle
Inserted on the mastoid process and nuchal line.
Inserted is more movable than origin
Anterior muscles cause
They cause flexion
Posterior muscles cause
They cause extension except the Knee
Lateral muscles
Causes abduction, away from body
Medial muscles
Causes adduction, toward the body
Muscular system is the skeletal muscle of the body
Frontalis
Elevated eyebrows
Orbicularis occuli
closes eyes
Orbicularis oris
closes lips
Zygomatic major and minor
raises corners of the mouth to smile
Risorius
expresses horror
What muscles are involved in crying
Friendly cat often zig zag down mountains
Frontalis
Corrigator supercilli
Orbicularis oculi
Zygomatic major and minor
Depressor anguli oris
Mentalis
Muscles for chewing to move the mandible
More Tea Less Milk
Medial pterygoid protrudes mandibles and moves it laterally, also elevate mandible
Temporalis elevate mandible
Masseter elevate mandible
Lateral pterygoid depresses mandible and moves it sideways
Muscles of swallowing
4 muscles, glossus- tongue
Genioglossus protrudes tongue or moves it to one side
Hyoglossus depresses and retracts tongue
Styloglossus- pulls tongue up and back
Palatoglossus- tip of tongue to roof of mouth
Anterior muscles of the neck
Move the hyoid and mandible
Muscles that flex and extends necks
Strong superhero train smarter and strategically
Sternocleidomastoid
Scalenes ( anterior, medial and lateral) flexors
Trapezius
Splenius (capitis and cervicis)
Semispinalis( capitis and cervicis) extensors
Suprahyoid muscles
Digastric, mylohyoid, geniohyoid, stylohyoid
Superficial muscles
Sternocleidomastoid and Platsysma overlap each other
Infrahyoid
Sternohyoid, sternothyroid, thyrohyoid, omohyoid
Anterior vertebral muscles
Rectus capitis, longus capitis, longus colli
Muscles of the neck move the head in all directions
Lateral muscles
Scalenes muscles; anterior, middle and posterior; superficial
Posterior muscles of the neck
Superficial layer- trapezius, splenus capitis, splenius cervicis
Deep Layer- Cervical transversospinales muscles( semispinalis capitis and cervicis)
Deepest layer- Suboccipital muscles ( rectus capitis posterior major, rectus capitis posterior minor, obliquus capitis superior, obliquus capitis inferior)
Core muscles
Thoracic and Abdominal Muscles
Diaphragm
Prime mover of inspiration
Intercostal muscles help to aid breathing
Superficial external intercostal- aid in inspiration of air during breathing they raise and expand the rib cage
Internal intercostal
Aid in expiration by drawing in ribs together,
under the externals
Innermost intercostal
Deepest and act as a synergists for action of the internal intercostals
3 flat muscles stack on top of each other to makes abdominal muscle
Transverse abdominal deepest
Internal oblique
External oblique superficial
2 vertical muscles that assist the flat muscles in compressing abdominal viscera, stabilize pelvis and depress ribs
Pyramidalis stabilizes pelvis
Rectus Abdominis- abs muscle
Abdominal muscles are layered for muscles
7 muscles layers together
External oblique- outermost
Internal oblique
transverse abdominis
rectus abdominis
Pyramidalis
Quadratus lumborum
Illiopsoas 2 parts
Superficial muscles that rotate the head
Splenius capitis and splenius cervicis
Superficial muscles of the back that move the shoulder
Trapezius
Levator scapulae
Rhombois minor and major
Latissimus dorsi muscle
Trapezius moves neck and stabilizes and moves the scapula
Descending elevates pectoral girdle
Middle retracts scapula
Ascending depresses shoulder
Intermediate and deep muscles of the back move the ribs
Serratus posterior superior and inferior muscles
Levatores Costarum
Muscles acting on the vertebral column flex the spin- Erector spinae
Spinalis group- closest to vertebrae
spinalis thoracics and cervicis
Longissimus group- next most lateral
Longissimus capitis, cervicis and thoracis
Illiocostalis group- most lateral
Illiocostalis cervicis, throracis, lumborum
Deep muscles of the black extend the trunk and rotating the vertebrae
Transverspinales
Semispinalis- capitis, cervcis, thoracic
Multifidus- under semispinalis and are stablilizers
Rotatores- deepest of the group
Core muscles used for hula hoop
Internal and external oblique
Transverse and Rectus Abdominis
Quadratus lumborum
Latissimus Dorsi
Erector Spinea group