Exam 1 Flashcards
Trapezius
-Spinotrapezius
-Acromiotrapezious
-Clavotrapezius
Origin: Occipital bone, cervical and thoracic vertebrae
Insertion: Scapula, clavicle
Action: Adduct, elevates, and raises scapula, raises clavicle
Deltoid
-Spinodeltoid
-Acromiodeltoid
-Clavodeltoid
Origin: Clavicle, scapula
Insertion: Humerus
Action: Abduct arm
Levator scapulae (ventralis)
Origin: Cervical vertebrae
Insertion: Scapula
Action: Raises scapula
Latissimus dorsi
Origin: Sacrum, ilium, lumbar and thoracic vertebrae, ribs
Insertion: Humerus
Action: Extends, adducts, rotates arm medially; pulls shoulder down and back
Rhomboideus major
Origin: Thoracic vertebrae
Insertion: Scapula
Action: Elevates, adducts scapula and rotates it downwards; stabilizes scapula
Rhomboideus minor
Origin: Cervical and thoracic vertebrae
Insertion: Scapula
Action: Elevates, adducts scapula and rotates it downward; stabilizes scapula
Rhomboideus capitus (cat)
Infraspinatus
Origin: Scapula
Insertion: Humerus
Action: Laterally rotates and adducts arm
Supraspinatus
Origin: Scapula
Insertion: Humerus
Action: Abducts arm
Terres Major
Origin: Scapula
Insertion: Humerus
Action: Extends, adducts, rotates humerus
Splenius (capitis)
Origin: Cervical and thoracic vertebrae
Insertion: Temporal and occipital bone
Action: Extends and rotates head
Serratus ventralis (anterior)
Origin: Ribs
Insertion: Scapula
Action: Abducts scapula and rotates it upward
Serratus dorsalis (posterior)
Origin: Vertebrae
Insertion: Ribs
Action: Elevates ribs
Spinalis (thoracis)
Origin: Thoracic and lumbar vertebrae
Insertion: Thoracic vertebrae
Action: Extends vertebral column
Longissimus thoracis
Origin: Sacrum
Insertion: Thoracic vertebrae and ribs
Action: Extends and bends vertebral column
Longissimus cervicis
Origin: Thoracic vertebrae
Insertion: Cervical vertebrae
Action: Extends Cervical vertebrae
Longissimus capitis
Origin: Thoracic and cervical vertebrae
Insertion: Temporal bone
Action Laterally flex and extend head
Illiocostalis
Origin: Ribs
Insertion: C7 vertebrae; lower ribs
Action: Extends and bends vertebral column
Multifdus
Origin: Sacrum, ilium, cervical, thoracic, and lumbar vertebrae
Insertion: Vertebrae above origin
Action: Straightens and rotates vertebral column
Pectoantebrachialis (cat)
Pectoralis major
Origin: Clavicle, sternum, ribs
Insertion: Humerus
Action: Flexes, adducts and rotates shoulder upwards
Pectoralis minor
Origin: Ribs
Insertion: Scapula
Action: Depresses scapula, rotates shoulder upward
Xiphihumeralis (cat)
External oblique
Origin: Ribs
Insertion: ilium; linea alba
Action: Compresses abdomen; flexes vertebral column
Internal oblique
Origin: ilium
Insertion: Lower ribs; linea alba
Action: Compresses abdomen; flexes vertebral column
Transversus abdominis
Origin: ilium, ribs
Insertion: Sternum, linea alba, pubis
Action: Compresses abdomen; flexes vertebral column
Rectus abdominis
Origin: Pubis
Insertion: Sternum, ribs
Action: Compresses abdomen; flexes vertebral column
Sternocleidomastoid
Origin: Sternum, clavicle
Insertion: Temporal bone
Action: Flex and rotate head
Sternomastoid (cat)
Cleidomastoid (cat)
Sternohyoid
Origin: Sternum (manubrium); clavicle
Insertion: Hyoid bone
Action: Depresses hyoid bone
Mylohyoid
Origin: Mandible
Insertion: Hyoid bone
Action: Elevates floor of mouth
Digastric
Origin: Mandible
Insertion: Hyoid bone
Action: Depresses mandible
Masseter
Origin: Zygomatic arch; mandible
Insertion: Mandible
Action: Elevates and protacts mandible
Temporalis
Origin: Temporal bone
Insertion: Mandible
Action: Elevates mandible
Sternothyroid
Origin: Sternum (manubrium)
Insertion: Thyroid cartilage
Action: Depresses thyroid cartilage
Thyrohyoid
Origin: Thyroid cartilage
Insertion: Hyoid bone
Action: Elevates thyroid cartilage; depresses hyoid bone
Cricothyroid
Origin: Cricoid cartilage of larynx
Insertion: Thyroid cartilage
Action: Produce tension and elongates vocal cords
Geniohyoid
Origin: Mandible
Insertion: Hyoid bone
Action: Draws hyoid bone and tongue anteriorly
