Transcript Chap 10 - Muscles

Read pgs 176 -194. Learn anterior and
posterior muscles (from memory).
Chap 9 – Muscles Part II
Learning Objectives:
1. List the criteria for naming muscles.
2. Name the common muscle fascicle
arrangements.
3. Define lever, load, and fulcrum. Explain how
these apply to muscles.
4. Name and identify the major muscles
identified in class.
PREDICT
• Can you guess how many muscles there
are in the human body?
Tips on Naming Skeletal Muscles, pg 185
• _________ of muscle – bone or body region associated
with the muscle
• _______ of muscle – e.g., the deltoid muscle (deltoid =
triangle)
• Relative _____ – e.g., maximus (largest), minimus
(smallest), longus (long)
• Direction of ______ – e.g., rectus (fibers run straight),
transversus, and oblique (fibers run at angles to an
imaginary defined axis)
• Number of _______ – e.g., biceps (two origins) and triceps
(three origins)
• Location of ____________ – named according to point of
origin or insertion
• ______ – e.g., flexor or extensor, as in the names of
muscles that flex or extend, respectively
Warm-Up Practice: Muscle
Arrangements
Muscles consist of fascicles which vary in
shape and function.
Instructions: Study the 7 fascicle arrangements
shown on pg 180 – 183. Then, complete
question #4 on pg 184. Be prepared to share &
discuss.
Estimated Time = 8 minutes
Fascicle Arrangements, pgs 180 - 183
A – Fascicles are endomysium-wrapped bundles of muscle fibers
Parallel – fascicles run parallel to the
long axis of the muscle (e.g., sartorius)
Fusiform – spindle-shaped muscles
(e.g., biceps brachii)
Pennate – short fascicles that attach
obliquely to a central tendon running
the length of the muscle (e.g., rectus
femoris)
Convergent – fascicles converge from
a broad origin to a single tendon
insertion (e.g., pectoralis major)
Circular – fascicles are arranged in
concentric rings (e.g., orbicularis oris)
Lateral Muscles of Scalp, Face & Neck, pg 187
Label your practice
diagram pg 192,
question #6 as I discuss
each muscle.
Corrugator
supercilii
Epicranius:
galea aponeurotica
Frontal belly
Occipital belly
Orbicularis oculi
temporalis
Levatator labii
superioris
massester
Zygomaticus minor
and major
buccinator
sternocleidomastoid
trapezius
platysma
Splenius capitis
Warm-Up Practice, pg 185 - 187
Instructions: Matching. Write correct answer in your notes next to this slide.
1. Main muscle of the scalp
a) platysma
2. Muscle that depresses the hyoid bone
b) Orbicularis oris
3. Muscle that closes lips
c) Zygomaticus (major and
minor)
4. Muscle that holds food between teeth during
chewing
d) Epicranius
5. Muscle that helps depress mandible
e) Frontalis
6. Protects eyes from intense light
f) Sternohyoid
7. Raises eyebrows
g) Buccinator
8. Rotates head left and right
h) Sternocleidomastoid
9. Elevates, protrudes and retracts the mandible
i) Orbicularis oculi
10. Smiling muscle
j) masseter
Muscles – Anterior Upper Body, pg 187 & 190
epicranius
temporalis
masseter
platysma
orbicularis oculi
zygomaticus
orbicularis oris
sternohyoid
trapezius
deltoid
Pectoralis minor
pectoralis major
Triceps brachii
Serratus anterior
intercostals
Rectus abdominus
Biceps brachii
External oblique
Internal oblique
brachialis
brachioradialis
Palmaris longus
sternocleidomastoid
Flexor carpi radialis
Pronator teres
Transversus
abdominus
Muscles – Anterior Lower Body, pg190
iliopsoas
pectineus
Rectus femoris
Vastus lateralis
Tensor fasciae latae
sartorius
Adductor longus
gracilis
Vastus medialis
gastrocnemius
Fibularis longus
soleus
Extensor digitorum
longus
Tibialis anterior
Review
1
2
3
Review
4
5
6
• Which 2
muscles are
used to flex
the elbow?
Muscles – Posterior Upper Body, pg 191
epicranius
sternocleidomastoid
Triceps brachii
trapezius
brachialis
deltoid
infraspinatus
Teres major
brachioradialus
Rhomboid major
Extensor carpi radialis
longus
Latissimus dorsi
Extensor carpi
ulnaris
Extensor digitorum
Flexor carpi ulnaris
Muscles – Posterior Lower Body, pg 191
Gluteus medius
Iliotibial tract
Gluteus maximus
Adductor magnus
Hamstrings:
Biceps femoris
Semitendinosus
Gastrocnemius
soleus
Fibularis longus
Calcaneal (Achilles tendon)
Semimembranosus
Review
1
2
3
Review
4
5
6
Study Activity: Reviewing the Superficial
Muscles
Instructions: Practice labeling the
muscles of the human body in your
workbook on pgs 193 & 194.