Practical 2 - OIA Flashcards
Pectoantebrachialis
O - Manubrium of sternum
I - Proximal end of ulna
A - Adduction of arm
Pectoralis major
O - Clavicular Head
I - Bicipital groove of humerus
A - Flexes and extends humerus
Pectoralis minor
O - 3rd and 5th ribs
I - Coracoid process of scapula
A - Stabilizes scapula, raises ribs in inspiration
External Oblique
O - 5th and 12th ribs
I - Iliac crest, public tubercle, linea alba
A - Contralateral rotation of torso
Clavotrapezius
O - Lambdoidal ridge of skull
I - Raphe of clavicle
A - Flexes forearm, turns head and extends humerus forward
Acromiotrapezius
O - Spines of cervical and ant. thoracic vertebrae (C2 to T1-4)
I - Metacromion and scapula spine
A - Draws scapula medially, holds scapulae together
Spinotrapezius
O - Spines of thoracic vert. (T1-4 to T11-13)
I - Scapula spine and surrounding fascia
A - Draws scapula dorsally and posteriorly
Latissimus dorsi
O - Thoracic and lumber vert. (T4-5 to L6)
I - Medial shaft of humerus
A - Pulls humerus caudodorsally
Levator scapulae ventralis
O - Transverse process of atlas and occipital bone
I - Metacromion of scapulae
A - Draws scapula cranially
Acromiodeltoid
O - Acromion of scapula
I - Deltoid ridge of humerus, spinodeltoid’s outer surface and brachial anticus
A - Extends and rotates humerus
Spinodeltoid
O - Spine of scapula
I - Deltoid ridge of humerus
A - Extends and rotates humerus
Clavobrachialis (clavodeltoid)
O - Raphe of clavicle
I - Ulna beneath semilunar notch
A - Flexes forearm, turns head and extends humerus forward
Teres major
O - Inferior angle of scapula
I - Intertubercular sulcus of humerus
A - Adduction of humerus
Subscapularis
O - Subscapular fossa
I - Lesser tubercle of humerus
A - Medial rotation of humerus
Xiphihumeralis
O - Xiphoid process of sternum
I - Humerus
A - assists pectorals minor, adducts arm
Internal oblique
O - Iliac crest
I - Linea alba
A - Compresses abdomen, rotation of vertebral column
Transversus abdominis
O - Iliac crest
I - Xiphoid process of sternum, lines alba
A - Compresses abdominal compartment
Rectus abdominis
O - Crest of pubic bone
I - 5th to 7th ribs, xiphoid process of sternum
A - Flexion of lumbar spine
Erector spinae
O - Spinous processes of T9-T12
I - Spinous processes of T1-T2
A - Extends vertebral column
Scalenus (anterior, medias, posterior)
O - Cervical vertebrae
I - 1st and 2nd ribs
A - Elevation of 1st and 2nd ribs
External intercostals
O - Lower border of ribs
I - Upper border of posterior-ward rib
A - Expands thorax during inhalation
Rhomboideus Major (smaller); Rhomboideus Minor (larger, behind scapula)
O - Spines of cervical and thoracic vert. (T1-4)
I - Vert. border of scapula and inferior angle (major)
A - Draws vertebral border of scapula medially and dorsally
Rhomboideus capitis
O - Lambdoidal ridge of skull
I - Vertebral border of scapula
A - Draws dorsal border of scapula cranially (forward)
Supraspinatus
O - Supraspinous fossa of scapula
I - Greater tuberosity of humerus
A - Extends arm (draws humerus anteriorly)
Infraspinatus
O - Infraspinous fossa of scapula
I - Lateral part of greater tuberosity of humerus
A - Flexes and rotates humerus laterally (outward)
Splenius
O - Spinous process of cervical vertebrae
I - Mastoid process of temporal and occipital bones
A - Extend, rotate, and laterally flex head
Sternomastoid
O - Manubrium of sternum and mid ventral line anterior to manubrium
I - Mastoid process and lambdoidal ridge
A - Turns head, depresses head and neck
Sternohyoid
O - First costal cartilage
I - Body of hyoid
A - Draws hyoid posteriorly (caudally)
Digastric
O - Jugular process of occipital, mastoid process of temporal
I - Ventral border of mandible
A - Depresses mandible
Mylohyoid
O - Medial surface of mandible
I - Median raphe - from hyoid to mandibular symphysis
A - Raises floor of mouth, draws hyoid posteriorly
Masseter
O - Malar and ventral border of zygomatic arch
I - Mandible - ventral border of ext. carotid fossa
A - Elevates mandible
Temporalis
O - temporal fossa of parietal squamosal and frontal
I - Coronoid process of mandible
A - Elevates mandible
Cleidomastoid
O - Mastoid process of temporal
I - Raphe of clavicle
A - Rotates head, depresses snout or draws clavicle forward
Sternothyroid
O - Manubrium of sternum
I - Throid cartilage
A - Depresses thread cartilage
Thyrohyoid
O - Thyroid cartilage
I - Hyoid bone
A - Elevates thyroid, and depresses hyoid bone.
