muscular anatomy (labeling packet)
DESCRIPTION
Muscle AnatomyTRANSCRIPT
Muscular Anatomy
Color and label your diagrams.You do NOT have to write down the “Other Notes.” These are just little
tidbits of information you might find interesting.
Facial Muscles
Frontalis--Eyebrow elevation
Orbicularis Oculi
--Closes eye
Temporalis
Other Notes:• Synergist
Closes jaw
Masseter
Other Notes:• Sometimes
considered the strongest muscle
• Much larger on animals (dogs and cats) since they use their mouths more.
• If your dog or cat has something in its mouth push on the masseter on both sides and they usually will release it.
--Closes jaw
Zygomaticus--Raises corner of mouth--“smile” muscle
Buccinator--Sucks in cheeks--“Trumpeters” muscle
Orbicularis Oris--Closes and protrudes lips--“Kissing” muscle
Trapezius
Other Notes:• Broad superficial posterior
muscle• “Shoulder rub” muscle• Common muscle for neck
“kinks” or sleeping wrong
--Shoulder elevation--Neck Extension
Other Notes:• Longest muscle name• Named for attachment points
– Sternum– Clavicle– Mastoid Process
Sternocleidomastoid--Neck flexion and rotation
Frontalis
Orbicularis OculiTemporalis
Masseter
Zygomaticus
Buccinator
Orbicularis Oris Trapezius
Sternocleidomastoid
ANTERIOR TRUNK MUSCLES
SternocleidomastoidNeck flexion and rotation
TrapeziusShoulder elevation
Neck Extension
DeltoidShoulder abduction
Other Notes:• Named for the shape of
the muscle • An upside-down
triangle• Delta-greek letter (∆)
Pectoralis MajorShoulder adduction
Other Notes:• Tendon is the
front of the armpit
External ObliqueVertebral column flexion and rotation
Rectus AbdominisVertebral column flexion
Sternocleidomastoid
Trapezius
Deltoid Pectoralis Major
External Oblique Rectus Abdominis
ANTERIOR TRUNK MUSCLES(Not Pictured but required for you to know)
• External Intercostals– Located in between
each of the ribs– Action: Breathing
• Internal Intercostals– Located in between
each of the ribs underneath the external intercostals
– Action: Breathing
• Internal Oblique– Located under the external
oblique– Fibers go the opposite
direction– Action: forms the abdominal
girdle
• Transverse abdominis– Located under the internal
oblique– Fiber direction is transverse– Action: Forms the abdominal
wall
I will show you pictures of these
Monday!
Posterior Trunk Muscles
TrapeziusShoulder elevation
Neck Extension
Deltoid--Shoulder abduction
Latissimus Dorsi--Shoulder extension and adductionOther Notes:• Tendon is the back of
the armpit
Erector Spinae--Back extension
Erector Spinae
Latissimus Dorsi
Deltoid
Trapezius
Arm Muscles
• Important!!! (Write this down)
– Wrist Flexors• Anterior side of forearm
– Wrist Extensors• Posterior side of forearm
See the “delta” (triangle)?
Deltoid--Shoulder abduction
Biceps brachii--Elbow flexion--Forearm supination
Other Notes:• It is the biceps brachii
• Not the biceps• You also have a biceps femoris
• Where do you think it is located?• Biceps brachii is located on the
anterior of the humerus
Triceps brachii--Elbow extension
Other Notes:• Triceps brachii is
located on the posterior humerus
Extensor digitorum--Extends fingers
Extensor digitorum
Triceps brachiiBiceps brachii
Deltoid
Arm Muscles(Not pictured but required for you to know)
• Extensor carpi radialis– Location: Posterior
forearm on lateral side (radius)
– Action: Wrist extension
• Flexor carpi radialis– Location: Anterior
forearm on lateral side– Action: Wrist flexion
• Flexor digitorum superficialis– Location: Anterior forearm;
superficial muscle– Action: Finger flexion
Posterior Anterior
Gluteus Medius--Hip Abduction & Internal Rotation
Gluteus Maximus--Hip extension
Hamstring--Hip extension--Knee flexion
Posterior
Gastrocnemius--Ankle plantar flexion--Knee flexion
Soleus--Ankle plantar flexion
Adductor Group--Hip
Adduction
Quadriceps--Hip flexion--Knee extension
Other Notes:• 4 muscles• One muscle (vastus
intermedius) is hidden in the diagram under the other 3 muscles
Sartorius-- Hip and knee Flexion-- Hip Abduction-- Hip External Rotation
Other Notes:• F.AB.ER. (crosses your
legs)
• Longest muscle in the body
Tibialis Anterior--Ankle dorsiflexion and inversion
Fibularis Muscles--Ankle plantar flexion and eversion
Gluteus Medius
Gluteus Maximus
Hamstring
Gastrocnemius
Soleus
AdductorGroup
Quadriceps
Sartorius
Tibialis Anterior
Fibularis Muscles
Not PicturedIliopsoas• Location: Very deep in
the pelvis• Action: Hip flexion