Transcript Muscle Models Part 1 - Cypress College A&P

Gross Anatomy of the
Muscular System
Facial, Trunk and Back Muscles
When studying the muscle
models
• Learn the NAME and LOCATION of the
muscle on the model.
• Learn the ACTION of the muscle (what
action it produces when the muscle
contracts)
A note on muscle actions…
• On the lab exam, you only need to provide
ONE action.
• The action MUST have an ACTION word
and the BONE/BODY part being acted
upon.
– Example: Acceptable – FLEX ARM
Unacceptable - FLEX
Facial Expression Muscles
•Epicranius – frontal belly
•Orbicularis oculi
•Orbicularis oris
Facial Expression Muscles
Epicranius - occipital belly
Zygomaticus
Risorius
Origin & Insertion
• Muscles attach at each end to a different
bone
• ORIGIN: The bone that DOESN’T move
when the muscle contracts
• INSERTION: The bone that DOES move
when the muscle contracts
Mastication & Neck Muscles
Temporalis
Masseter
Sternocleidomastoid
Torso Muscles – Study on the following 2 models
Shows SUPERFICIAL
muscles only!!!
Shows SUPERFICIAL
muscles on RIGHT and
DEEP muscle on LEFT!!!
TORSO MUSCLES –
SUPERFICIAL ONLY!!!
Deltoid
Pectoralis major
Serratus Anterior
TORSO MUSCLES –
SUPERFICIAL ONLY!!!
Rectus abdominis
External oblique
TORSO MUSCLES –
SUPERFICIAL & DEEP!!!
External intercostals
Internal intercostals
TORSO MUSCLES –
SUPERFICIAL & DEEP!!!
Deltoid
Pectoralis major
Pectoralis minor
Serratus anterior
TORSO MUSCLES –
SUPERFICIAL & DEEP!!!
Rectus abdominis
External oblique
Internal oblique
BACK MUSCLES –
SUPERFICIAL ONLY!!!
Deltoid
Trapezius
Latissimus dorsi
BACK MUSCLES –
SUPERFICIAL ONLY!!!
Infraspinatus
Teres Minor
Teres Major
Infraspinatus
BACK MUSCLES –
SUPERFICIAL ONLY!!!
Teres Minor
Teres Major
BACK MUSCLES –
SUPERFICIAL & DEEP!!!
Supraspinatus
Infraspinatus
Teres Minor
Teres Major
BACK MUSCLES –
SUPERFICIAL & DEEP!!!
Deltoid
Trapezius
Latissimus dorsi
BACK MUSCLES –
SUPERFICIAL & DEEP!!!
Infraspinatus
Teres Minor
Teres Major
BACK MUSCLES –
SUPERFICIAL &
DEEP!!!
Rhomboid Minor
Rhomboid Major