Anterior Muscles Flashcards
every muscle needs what attached
a neuron
myofibril
fascicle
endomycium
perimycium
epimycium
aponeurosis
flat sheet of connective tissue
retinaculum
fibrous tissue holding tendon in place
motor neurons
transmits signals away from the brain
sensory neurons
transmits signals toward the brain
epicranium
galea apneurotica
frontalis / front belly
occipitalis
wrinkle forehead/move eyebrows
orbicularis oris
opens closes mouth
first sphincter of digestive tract
platysma
flexes neck tendons
moves jaw
buccinator
blow/sucks
muscles of mastication
temporalis muscle
masseter
medial/lateral pterygoid
temporalis muscle
elevates and retracts jaw
-origin-superior/inferior temporal bone
-insertion-coronoid process of mandible
masseter
elevates and protract jaws
-origin- zygomatic arch
-insertion- lateral surface of coronoid process
-sternocleidomastoid
-superior/inferior movement of head
-lateral/medial movement of head
-origin-manubrium
-insertion-mastoid process of temporal bone
pectoralis minor
protracts and depresses scapula
insertion-coracoid process
serratus anterior
origin-lateral half of ribs
insertion-crest of scapula
stabilizes and rotates scapula
-pectoralis major
-prime mover of arm movement and rotation
-origin- clavical and costal cartilege
-insertion-intertubercle groove of humerus
-deltoid
-anterior, lateral, posterior fibers
-origin- acromial end of clavicle, spine of scapula
-insertion- deltoid tuberosity
function of anterior fibers of deltoid
flex and medially rotate
function of lateral fibers of deltoid
prime abductor
function of posterior fibers of deltoid
extend and laterally rotate
coracobrachialis
origin-corocoid process
biceps brachii
origin-
long head-supraglenoid tubercle of scapula
short head-coracoid process of scapula
-flexes elbow
external abdominal oblique muscles
compress abdomen
internal abdominal oblique muscles
compress abdomen
transverse abdominis muscle
compresses abdomen
supports spine
rectus abdominis
-origin-superior surface of pubis
-insertion-xiphoid process and interior surface of ribs
-compresses abdomen and flexes vertebral column
linea semilunaris
linea alba
inguinal ligament
diaphram
-tensor fascia latae
-origin- Iliac crest and lateral surface
of the anterior superior iliac spine.
-Insertion- liotibial track (IT Band).
-Abducts and medially rotates
the femoral region at the
acetabulofemoral joint.
iliotibial track
Gracilis
-Adducts and flexes femoral
region, flexes crural region
-attached- adductors
magnus
longus
brevis
-sartorius
-Flexes acetabulofemoral joint and
laterally rotates femur. Flexes
tibiofemoral joint and medially rotates calf
-origin-anterior superior iliac spine
-insertion-medial side of tibial tuberocity
-Rectus femoris
-Extends leg at the tibiofemoral joint.
Rectus femoris also flexes the femoral region
-origin-Anterior inferior iliac spine
-insertion- Quadriceps tendon to patella,
then patellar ligament to tibial tuberosity
-Vastus Lateralis
-Extends leg at tibiofemoral joint.
-orgins- Greater trochanter and linear
aspera of femur
-insertion- Quadriceps tendon to patella,
then patellar ligament to tibial tuberosity
-vastus medialis
-Extends leg at tibiofemoral joint
-origin-intertrochanteric line and linea
aspera of the femur
-insertion- Quadriceps tendon to patella,
then patellar ligament to tibial tuberosity
-vastus intermedius
-Extends leg at tibiofemoral joint
-origin-Anterior and lateral surface of femur
-insertion- Quadriceps tendon to patella,
then patellar ligament to tibial tuberosity
-Tibialis anterior
-Primary dorsiflexor of the foot.
It inverts the talocrural region
-Peroneus longus
-Plantar flexes and everts
the foot at talocrural region
iliopsoas
external intercostals
helps with relaxed breathing
internal intercostals
helps with forced breathing
which is stronger, vertebral or abdominal muscles?
vertebral as they always have to resist force of gravity
