ANSWER THE ESSAYS AND THE BULLET (-) QUESTIONS

profiledream86
APLECTURE16GrossAnatomyofSkeletalMuscle.ppt
Home>Biology homework help>Anatomy homework help>ANSWER THE ESSAYS AND THE BULLET (-) QUESTIONS

Gross Anatomy of Skeletal Muscle

Note:

  • As you go through the muscles
  • Write in muscles on the sheets handed out to identify their location
  • Do the actions of these muscles to help you remember what they do
  • You are not responsible for knowing the origin and insertion

Head and Neck Muscles

  • Facial Muscles
  • Inserted into soft tissues (muscles or skin)
  • Smile, grin, frown, pout, kiss, etc…
  • Chewing Muscles
  • Breakdown of food

Facial Muscles

  • Frontalis
  • Raise eyebrows in surprise
  • Wrinkle forehead

Facial Muscles

  • Orbicularis oculi
  • Close eyes, squint, blink, wink

Facial Muscles

  • Orbicularis oris
  • Kissing muscle

Facial Muscles

  • Buccinator
  • Flattens cheek
  • Whistling
  • Chewing muscle

Facial Muscles

  • Zygomaticus

-Smiling muscle

  • Levator Labii

superioris

-Elevates upper lip, nose

  • Depressor Anguli Oris

-Depresses angle of mouth

Chewing Muscles

  • Masseter
  • Closes jaw

Chewing Muscles

  • Temporalis
  • Closes jaw

Neck Muscles

  • Platysma
  • Downward sag of mouth

Neck Muscles

  • Sternocleidomastoid
  • Flex neck
  • Rotate head to opposite side

Trunk Muscles

  • Posterior Muscles
  • Most move vertebral column
  • Anterior Thorax Muscles
  • Move ribs, head, and arms
  • Abdominal Wall Muscles
  • Move vertebral column

Anterior Muscles

  • Pectoralis Major
  • Adduct and flex arm

Anterior Muscles

  • Pectoralis Minor
  • Depresses scapula

Anterior Muscles

  • Serratus Anterior
  • Protracts scapula
  • Scalenes
  • Elevate ribs; expand thorax
  • Intercostal Muscles

External intercostals

  • Inhalation

Internal intercostals

  • Exhalation

Anterior Muscles

  • Abdominal Girdle Muscles
  • Rectus abdominis
  • External oblique
  • Internal oblique
  • Transversus abdominis

Anterior Muscles – Abdominal Girdle

  • Rectus abdominis
  • Flex vertebral column
  • Compress abdominal contents during defecation and childbirth
  • Forced breathing

Anterior Muscles – Abdominal Girdle

  • External Oblique
  • Flex vertebral column
  • Rotate trunk

Anterior Muscles – Abdominal Girdle

  • Internal oblique
  • Flex vertebral column
  • Rotate trunk

Anterior Muscles – Abdominal Girdle

  • Transversus abdominis
  • Compresses abdominal contents

Posterior Muscles

  • Trapezius

-Elevate, depress, adduct, stabilize scapula

Levator scapulae

-elevates scapula

Supraspinatus

-abducts arm

Rhomboids

-retract scapula

Infraspinatus

-extends, rotates arm Teres Major

extends shoulder; adducts,rotates arm

Posterior Muscles

  • Latissimus dorsi
  • Extends and adducts humerus

Posterior Muscles

  • Deltoid
  • Common intramuscular injection site
  • Prime movers of arm abduction

Posterior Muscles

  • Erector Spinae
  • Hold body upright