Test 3- Skeletal Muscle Flashcards
Superficial to frontal bone
Frontalis
Extends from cheekbones to corners of the mouth
Zygomaticus
What are the muscles of mastication/chewing?
Masseter
Temporalis
Muscles that move the head- anterolateral
Sternocleidomastoid
Scalenes
Muscles that move the head and extend the trunk- DEEP
Splenius Erector Spinae -Iliocostalis -Logissimus -Spinalis
Raises the eyebrows/wrinkles the brow
Frontalis
Raises lateral corners of the mouth when smiling
Zygomaticus
Elevates the mandible
Masseter
Elevates mandible
Temporalis
Flexes and/or laterally rotates the head
Sternocleidomastoid
Elevates first two ribs, flexes and rotates neck
Scalenes
Extends the head
Splenius
Extends and laterally flexes vertebral column
Iliocostalis
Extends ad laterally flexes vertebral column, extends and rotates the head
Longissimus
Extends vertebral column
Spinalis
Muscles of Respiration
External Intercostals
Internal Intercostals
Diaphragm
Elevates the rib cage for inspiration
External Intercostals
Depress rib cage for forced exhalation
Internal intercostals
Contracts to increase intra-abdominal pressure to force air into lungs
Diaphragm
Muscles of the abdominal wall
External oblique
Internal Oblique
Transversus abdominis
Rectus abdominis
Fibers run down toward the midline
External oblique
Fibers run up towards the midline
Internal Oblique
Fibers run across
Transversus abdominis
Fibers run up and down
Rectus abdominis
Flexes vertebral column, rotation is one side
External Oblique
Internal Oblique
Compresses the abdomen
Transversus abdominis
Flex and rotates lumbar abdominal region
Rectus abdominis
Muscles of the Anterior Thorax
Pectorals major
Serrates anterior
large chest muscle
pectoralis major
finger-like muscles
serratus anterior
protracts and rotates scapula downward
pectoralis major
rotates scapula upward
serratus anterior
Muscles of the posterior thorax
Trapezius
Levator Scapulae
Rhomboids
Broad back muscle
Trapezius
Elevates an adducts scapula
Levator scapulae
Stabilizes scapula
rhomboids (major and minor)
Stabilize, elevates, retracts and rotates scapula, extends head
Trapezius
Muscles crossing the shoulder that move the arm
pectorals major deltoid latissimus dorsi theres major subscapularis infraspinatus teres minor
Shoulder muscle
Deltoid