Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
A&P - Lab List 8
Chapter 10: Muscles
| Term | Definition |
|---|---|
| Opposing muscle groups | Masseter & platysma, erector spinae & rectus abdominus, external intercostal muscles & internal intercostal muscles, biceps brachii & triceps brachii, deltoid & pectoralis major, and quadriceps femoris & hamstrings |
| Origin of orbicularis oculi | Frontal bone and maxillary bone |
| Insertion of orbicularis oculi | Tissue around eyelids |
| Action of orbicularis oculi | Closes eye: blink, squint |
| Origin of orbicularis oris | Maxillary bone and mandible |
| Insertion of orbicularis oris | Lips |
| Action of orbicularis oris | Compresses, purses, and protrudes lips |
| Origin of masseter | Zygomatic arch and maxillary bone |
| Insertion of masseter | Angle and ramus of mandible |
| Action of masseter | Elevates mandible and closes the jaws (strongest jaw muscle) |
| Origin of platysma | Fascia of chest, over pectoral muscle and deltoid muscle |
| Insertion of platysma | Mandible (lower margin), skin of the cheek, and corners of the mouth |
| Action of platysma | Tenses the skin of the neck and depresses the mandible |
| Origin of sternocleidomastoid | Manubrium and medial end of the clavicle |
| Insertion of sternocleidomastoid | Mastoid process of the temporal bone and superior nuchal line of the occipital bone |
| Action of sternocleidomastoid | Flex the neck or bend head toward shoulder and turns face to opposite side |
| Origin of trapezius | Occipital bone, and spinous processes of C7 & T1-T12 |
| Insertion of trapezius | Acromion of scapula, scapular spine, and lateral third of clavicle |
| Action of trapezius | Depends on active region and state of other muscles. May elevate, retract, depress or rotate scapula upward; elevate clavicle; or extend neck |
| Origin of latissimus dorsi | Spinous processes of T6-T12 and all lumbar vertebrae, ribs 8-12, and iliac crest |
| Insertion of latissimus dorsi | Floor of intertubercular groove of humerus |
| Action of latissimus dorsi | Extension, adduction and medial rotation at shoulder |
| Origin of erector spinae (more superficial = spinalis group, longissimus group, iliocostalis group, and deep layers) | n/a |
| Insertion of erector spinae (more superficial = spinalis group, longissimus group, iliocostalis group, and deep layers) | n/a |
| Action of erector spinae (more superficial = spinalis group, longissimus group, iliocostalis group, and deep layers) | Laterally flexes or extends vertebral column |
| Origin of rectus abdominus | Pubic crest and symphysis pubis |
| Insertion of rectus abdominus | Inferior surfaces of costal cartilages (ribs 5-7) and xiphoid process |
| Action of rectus abdominus | Depresses ribs, flexes vertebral column, and rotate lumbar region |
| Origin of external oblique | Outer surface of lower 8 ribs |
| Insertion of external oblique | Aponeurosis-linea alba, pubic crest, and iliac crest |
| Action of external oblique | Flex vertebral column, rotate torso, lateral flexion, and increase abdominal pressure |
| Origin of diaphragm | Xiphoid process, cartilages of ribs 4-10, and anterior surfaces of lumbar vertebrae |
| Insertion of diaphragm | Central tendinous sheet |
| Action of diaphragm | Inspiration: contraction expands thoracic cavity and compresses abdominopelvic cavity |
| Origin of external intercostal muscles | Inferior border of rib above |
| Insertion of external intercostal muscles | Superior border of rib below |
| Action of external intercostal muscles | Elevates rib cage, aids inspiration, and is synergist with diaphragm |
| Origin of internal intercostal muscles | Superior border of rib below |
| Insertion of internal intercostal muscles | Inferior border or rib above |
| Action of internal intercostal muscles | Depresses rib cage for forced expiration |
| Origin of biceps brachii | Coracoid process (short head) and supraglenoid tubercle on scapula (long head) |
| Insertion of biceps brachii | Tuberosity of the radius |
| Action of biceps brachii | Flexion at elbow and shoulder, supination |
| Origin of triceps brachii | Superior, lateral margin of olecranon of ulna, and humerus |
| Insertion of triceps brachii | Olecranon of the ulna |
| Action of triceps brachii | Extension at the elbow |
| Origin of deltoid | Lateral third of clavicle and acromion and spine of scapula |
| Insertion of deltoid | Deltoid tuberosity of humerus |
| Action of deltoid | Abduction at shoulder flexion and medial rotation, extension and lateral rotation |
| Origin of pectoralis major | Cartilages of ribs 2-6, body of sternum, and sternal end of clavicle |
| Insertion of pectoralis major | Crest of greater tubercle and lateral lip of anterior intertubercular groove of humerus |
| Action of pectoralis major | Flexion, adduction and medial rotation at shoulder |
| Origin of quadriceps femoris (rectus femoris, vastus intermedius, vastus lateralis, and vastus medialis) | Anterior inferior iliac spine and superior acetabular, rim of ilium, anterior/lateral femur, greater trochanter, and intertrochanteric line |
| Insertion of quadriceps femoris (rectus femoris, vastus intermedius, vastus lateralis, and vastus medialis) | Tibial tuberosity via patellar ligament |
| Action of quadriceps femoris (rectus femoris, vastus intermedius, vastus lateralis, and vastus medialis) | Extension at knee and flexion at hip |
| Origin of sartorius | Anterior superior iliac and spine |
| Insertion of sartorius | Medial surface of tibia near tibial tuberosity |
| Action of sartorius | Flexion at knee, flexion and lateral rotation at hip |
| Origin of hamstrings (biceps femoris, semitendinosus, and semimembranosus) | Ischial tuberosity (long head), linea aspera and distal, femur (short head), ischial tuberosity, and ischial tuberosity |
| Insertion of hamstrings (biceps femoris, semitendinosus, and semimembranosus) | Head of fibula and lateral condyle of tibia, medial tibia, and medial condyle of tibia |
| Action of hamstrings (biceps femoris, semitendinosus, and semimembranosus) | Extends thigh and flexes knee |
| Origin of gluteus maximus | Dorsal ilium, dorsal sacrum, and dorsal coccyx |
| Insertion of gluteus maximus | Gluteal tuberosity of femur iliotibial tract- tibial tuberosity |
| Action of gluteus maximus | Extend thigh, laterally rotate thigh, and abduct thigh |
| Origin of gastrocnemius | Medial and lateral femoral, and condyles |
| Insertion of gastrocnemius | Calcaneus via calcaneal tendon |
| Action of gastrocnemius | Extension at ankle (plantar flexion), inversion of foot, and flexion at knee |
| Origin of soleus | Head and proximal shaft of fibula and adjacent posteromedial shaft of tibia |
| Insertion of soleus | Calcaneus via calcaneal tendon |
| Action of soleus | Extension at ankle (plantar flexion) |
| Origin of tibialis anterior | Lateral condyle of tibia |
| Insertion of tibialis anterior | First cuneiform and first metatarsal |
| Action of tibialis anterior | Dorsiflexion |
Created by:
Farwalker3
Popular Anatomy sets