Lab Midterm 3 Flashcards
Primary action of occipitofrontalis
Raise eyebrows
Wrinkle forehead
Primary actions of Orbicularis Oculi
Close eye
Squinting
Zygomaticus major origin and insertion
Origin: zygomatic bone
Insertion: tissue at corner of mouth
Zygomatic major primary action
Smiling, draws angle of mouth upwards
Buccinator primary actions
Compress cheek against teeth
Helps with sucking, blowing, keeping food on occlusal surface of teeth
Orbicularis oris primary action
Closes mouth
Kissing (protrude lips)
Platysma primary action
Depress mandible
Master muscle origin and insertion
Origin: zygomatic arch
Insertion: angle of mandible
Primary action of masseter
Elevation of mandible
Origin and insertion of Temporalis
Origin: Parietal, temporal bones
Insertion: Coronoid process of mandible
Primary action of Temporalis
Elevation and retraction of mandible
Primary action of Medial and Lateral pterygoid
Lateral movement of mandible (teeth grinding)
Origin and Insertion of sternocleidomastoid
Origin: sternum and clavicle
Insertion: mastoid process of the temporal bone
Primary action of Sternocleidomastoid
Both: flexion of neck
One: Rotation to the opposite side
Origin and insertion of trapezius
Origin: Occipital bone, nuchal ligament, spinous process of 7th cervical and all thoracic vertebrae
Insertion: clavicle and acromion process of spine and scapula
Primary action of Trapezius
Elevation, retraction, depression of scapula/shoulder
Extension of neck
Serratus anterior origin and insertion
Origin: ribs (1-9), lateral wall of rib cage
Insertion: scapula on the medial (vertebral) border
Primary action of Serratus anterior
Protraction of scapula/shoulder
Holds scapula against ribs
Intercalated discs in Cardiac Muscle
What is function of intercalated disc in cardiac muscle tissue
Allow cells to hold on to each other (desmosomes, anchoring junctions)
Spread action potential (gap junction)
Primary function of Rhomboid Major
Retraction of scapula/shoulder
Primary function of Rhomboid minor
Retraction of scapula/shoulder
Primary action of Rectus Abdominis
Compresses abdomen;
flexion of vertebral
column
Origin of External abdominal oblique
Ribs; lateral side of lower half of rib cage
Insertion of External abdominal oblique
Iliac crest and pubis; inguinal ligament
Primary action of external abdominal obliques
Compresses abdomen; flexion, rotation, lateral flexion of vertebral column
Primary action of Internal abdominal oblique
Compresses abdomen; flexion, rotation, lateral flexion of vertebral column
Primary action of transverse abdominis
Compresses abdomen
Primary action of Erector spinae (muscle group)
Extension of the vertebral column
Primary action of Levator ani (muscle group)
Supports pelvic organs and pelvic floor
Primary action of Diaphragm
Decreases intrapleural pressure to that lungs increase in volume (inhalation)
Primary action of external intercostal muscles
Elevation of ribs (inhalation)
Primary action of internal intercostal
Depression of ribs (exhalation)
Origin of deltoid
Acromion process and spine of scapula; clavicle
Insertion of deltoid
Deltoid tuberosity of the humerus
Primary action of deltoid
Abduction, flexion, extension of the shoulder
Origin of Latissimus Dorsi
Lumbar and lower thoracic vertebrae; sacrum and iliac crest
Insertion of Latissimus Dorsi
Intertubercular sulcus of the humerus
Primary action of Latissimus Dorsi
Adduction and extension of the shoulder
Origin of Pectoralis major
Clavicle, sternum, and costal cartilage
Insertion of Pectoralis Major
Intertubercular sulcus (lateral lip) of the humerus
Primary action of Pectoralis Major
Adduction and flexion of the shoulder; medial rotation
Insertion of Supraspinatus
Greater tubercle of humerus
Insertion of Infraspinatus
Greater tubercle of humerus
Insertion of Teres minor
Greater tubercle of humerus
Insertion of subscapularis
Lesser tubercle of humerus
Primary action of Supraspinatus
Abduction of shoulder (starts abduction)
Primary action of Infraspinatus
Lateral rotation of shoulder
Primary action of teres minor
Lateral rotation of shoulder
Primary action of subscapularis
Medial rotation of shoulder
Origin of Biceps brachii (long head)
superior to glenoid fossa; tendon runs in intertubercular sulcus and though the glenohumeral cavity.
Origin of biceps brachii (short head)
coracoid process of the scapula
Insertion of biceps brachii (short and long head)
radial tuberosity of the radius (proximal end of the radius)
Origin of Brachialis
Humerus; distal half on the anterior surface
Insertion of brachialis
Ulna; proximal (coronoid process)
Primary action of brachialis
Flexion of the elbow
Origin of Brachioradialis
Humerus; distal and lateral region
Insertion of brachioradialis
Radius, distal and lateral region
Primary action of brachioradialis
Flexion of the elbow (advantage when wrist is pronated)
Insertion of Triceps brachii: Long head
Long head: inferior to the glenoid fossa
Origin of triceps brachii: lateral head, and medial head
Lateral and medial heads: humerus
Insertion of triceps brachii
olecranon process of the ulna
Primary action of triceps brachii
Extension of the elbow (Extension of the shoulder; long head)
Primary action of pronator teres
Pronation of the wrist/forearm
Primary action of flexor carpi radialis
Flexion of the wrist; abduction of wrist
Primary action of palmaris longus
Flexion of the wrist
Primary action of flexor carpi ulnaris
Flexion of the wrist; adduction of wrist
Primary action of extensor carpis radialis longus
Extension of the wrist; abduction of wrist
Primary action of Extensor carpi radialis brevis
Extension of the wrist; abduction of wrist
Primary action of extensor digitorum
Extension of the wrist AND fingers
Primary action of extensor carpi ulnaris
Extension of the wrist; adduction of wrist
Origin of Gluteus Maximus
Iliac crest, sacrum and coccyx
Insertion of gluteus Maximus
Gluteal tuberosity of femur and iliotibial band/tract
Primary action of gluteus Maximus
Extension of the hip; lateral rotation of hip
Origin of gluteus medius
Ilium
Insertion of gluteus medius
Greater trochanter of femur