Transcript Chap 10 - Muscles

Read pgs 285 – 293. Learn anterior and
posterior muscles (from memory).
Chap 10 - Muscles
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
• _________ 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.
Goal: In this self-practice, you will observe
muscle arrangements & learn their shapes.
Estimated Time = 8 - 10 minutes
Fascicle Arrangements
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)
Muscles as Lever Systems
• _______ – a rigid bar that moves on a
fulcrum, or _____ point
• ______ – force applied to a lever
• _____ – resistance moved by the effort
Think-Pair-Share
Instructions: Quickly pair with a partner. Discuss the
question below (1- 2 minutes), Be prepared to share your
answer.
The elbow is a lever
system. Where is the
load, effort, and
fulcrum located?
Effort
Load
Fulcrum
• Which 2
muscles are
used to flex
the elbow?
Muscles – Anterior Upper Body
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
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
Muscles – Posterior Upper Body
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
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
Practice Activity: Reviewing the Superficial
Muscles
Goal: (Putting It All Together)
CHALLENGE: Can you commit all the names of the
muscles that we just discussed to memory BEFORE
leaving class today?
* Use handout. See how many you can do WITHOUT
looking at your book or notes FIRST.
NOTE: If you finish before others, please
use the time to study & commit these to
memory. You will need to know them for the
next test.