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60 terms

saladin chapter 10 muscles

STUDY
PLAY
Functions of muscles
movement of body parts and organ contents
maintain posture and prevent movement
communication-speech, expression and writing
control of openings and passageways
heat production
perimysium
larger blood vessels and nerves, stretch receptors
surrounds bundle of cells called a fasicle
endomysium
inner most; allows room for capillaries and nerve fibers
direct muscle attachments
epimysium (muscle) is continuous with periosteum (bone)
indirect muscle attachments
epimysium continues as tendon or aponeurosis (broad sheet) that merges into periosteum as perforating fibers
muscle attachment to dermis
allows you to smile
muscles involved in laughing
levator labii superioris
zygomaticus minor
zygomaticus major
risorius
muscle affected by whiplash
sternocleidomastoid
intrinsic muscle
entirely contained within a particular region; both origin and insertion
extrinsic muscle
acts upon a designated region but has its origin elsewhere
intrinsic tongue muscles
vertical, transverse and longitudinal fasicles
extrinsic tongue muscles
connect to the tongue behind hyoid, styloid process, palate and inside of chin
Biting and Chewing (mastication)
Temporalis and Masseter elevate the mandible
Medial and Lateral Pterygoids help elevate, but produce lateral swinging of jaw
muscle used to yawn
digastric
muscles used in breathing
diaphragm and external intercostal muscles
inhaling
Which requires more muscular effort-inhaling or exhaling?
normal expiration
requires little muscular activity
elastic recoil and gravity collapses the chest
muscles of respiration
internal and external intercostals
internal intercostals
extend upward and anteriorly from rib to rib
external intercostals
extend downward and anteriorly from rib to rib
4 pairs of sheetlike muscles of abdomen
external oblique
internal oblique
transverse abdominis
rectus abdominis
rectus abdominis
muscle referred to as six pack
erector spinae group
responsible for back pain?
3 columns muscle from sacrum to ribs
extends vertebral column
Inguinal hernia
most common type of hernia (rare in women)
viscera enter inguinal canal or even the scrotum
Pectoralis Minor
protracts and depresses scapula
Serratus Anterior
abducts and rotates or depresses scapula
throwing muscle
Clavicle
braces the shoulder and limits movement
4 Posterior Scapular Muscles
trapezius
rhomboideus minor
rhomboideus major
levator scapulae
pectoralis major/latissimus dorsi
muscles crossing shoulder joint to humerus
deltoid
prime mover of humerus
teres major
assists in extension of humerus
Rotator Cuff Muscles (SITS)
supraspinatus
infraspinatus
teres minor
subscapularis
Rotator Cuff Muscles (SITS)
4 muscles that help reinforce joint capsule of shoulder
Principle Flexors of Elbow
biceps brachii
brachialis
radius
biceps brachii inserts on ___
ulna
brachialis inserts on ___
brachioradialis
synergistic flexor of elbow
triceps brachii
prime extensor of elbow
ulna
triceps brachii inserts onto
supination
muscle action makes palm face anteriorly
pronation
muscle action makes palm face posteriorly
digitorum
inserts into fingers
carpi
inserts onto carpal bones
pollicis
inserts into thumb
thenar group
fleshy base of thumb muscles
Carpal Tunnel Syndrome
repetitive motions cause inflammation and pressure on median nerve
Iliopsoas muscle
crosses anterior surface of hip joint and inserts on femur
major hip flexor
Gluteus maximus
forms mass of the buttock
provides most of lift when you climb stairs
Iliotibial band
band of fascia lata attached to the tibia
Deep Gluteal Muscles
Shifts body weight when foot is lifted
Adductors of the Hip Joint
Adductor magnus
Gracilis
Pectineus, Adductor brevis and Adductor longus adduct femur
Gracilis
flexor of the knee
Muscles acting on knee
4 headed muscle attaches to tibial tuberosity (next slide)
quadriceps femoris tendon attaches to patella
quadriceps femoris
4 headed muscle that extends knee joint
Extensor hallucis longus
muscle used for extension of big toe and ankle
Calcaneal (Achilles) Tendon
strongest tendon in the body
Gastrocnemius (calf)
flexes knee and plantar flexes ankle
Soleus
plantar flexes ankle
posterior (flexor) compartment of the thigh
contains hamstring muscles:
biceps femoris
semitendinosus
semimembranosus
Lateral Compartment of the Leg
Fibularis Longus + Fibularis Brevis
Provides lift and forward thrust