Muscles functions/origins/insertions/innervations Flashcards
what is the main function of the ILS muscles?
extension of the spine
what is the innervation of serratus posterior inferior?
anterior rami of intercostal nerve T9-T12
anconceus
o: lateral epicondyle of humerus
i: olecranon of ulna
brachialis
o: Anterior shaft of the humerus
i: Ulnar tuberosity
subscapularis
o: subscapular fossa
i: lesser tubercle of the humerus
what is the main fct of the biceps brachii?
supination
flexion of the elbow joint
what innervated the sternocleidomastoid?
spinal accessory nerve
rectus abdominus OI
O: Public crest/superior public ramus
i: Costal cartilage of ribs V-VII
Xiphoid process
infraspinatus
o: Infraspinous fossa of the scapula
i: middle facet of greater tubercle
external oblique
o: Ribs V-XII
i: linea alba, anterior hip bone
Longus Colli
O
I
FCT
o: vertebral bodies
i: TPs of the cervical vertebrae
fct: flexion of the cervical spine
sternocleidomastoid
OI?
o: manubrium and sternum, medial clavicle
i: mastoid process of the skull
Longus Capitis
O
I
FCT
O: TP oc cervical vertebrae
I occipital bone
FCT: flexion of the head
what is the OI of Serratus posterior inferior?
o: Thoracolumbar fascia
SPs of TXI-LII
i: ribs 9-12
Levator scapulae
OI
o: TPs of CI-CIV
I: Superiomedial boarder of the scapula
fct of pectoalis major about the GH?
GH flexion, adduction and medial rotation
function of latissimus dorsi about the GH joint?
extension, adduction and medial rotation
deltoid
O: Horseshoe (clavicle, acromion, spine of scapula)
I: deltoid tuberosity of the humerus
External intercostal muscle
OI
o: inferior surface of rib
i: superior surface of rib below
OI pectoralis major
o: clavicular and sternal heads
i: lateral lip of the intertibercular goove to the humerus
Rectus capitis major
OI and function
o: SP of C2
i: occuipital bone
fct: Extension & ipsilateral rotation of head
obliquus capitis inferior
OI and fct?
o: SP C2
i: TP C1
fct: ipsilateral rotation of the neck
Scalenes
O
I
FCT
o: TP of cervical vertebrae
i: rib 1 (anterior or middle)
rib 2 (posterior)
Flexor Pollicis Longus
o: Radius, Interosseous membrane
i: Base of 1st distal Phalanx (thumb)
fct: Flexion of the wrist, MCP, PIP & DIP of the thumb
what extrinsic muscle of the back is responsible for the depression of the ribs?
Serratus posterior inferior
obliquus capitis superior
OI and fct?
o: TP of atlas
I: occipital bone
fct: Extension & ipsilateral lateral flexion of the head
transversus thoracis
OI?
o: sternum and xiphoid process
i: inner surface of costal cartilage of ribs 2-6
psoas major
o: T12
i: L5
what are the muscles of the intrinsic back divided?
into 3 groups
ILS muscles
transversospinal muscles
minor deep muscles
internal oblique
o: Thoracolumbar fascia
Anterior hip bone
i: Ribs X-XII
Linea Alba
what movement is accomplished by sternocleidomastoid?
Bilateral extension of the head at the atlanto-occipital joint & flexion of the cervical spine
Unilateral: contralateral rotation, ipsilateral lateral flexion
Flexor Digitorum Profundus (FDP
o: Ulna, Interosseous membrane
i: 4 tendons to the base of distal Phalanx of digits II-V fct: Flexion of the wrist, MCP, PIP, DIP
movement accomplished by the deltoid at the GH joint?
GH flexion/extension, abduction and lateral rotation
what are the anterior muscles of the neck?
Rectus capitis lateralis Rectus capitis anterior Longus Capitis longus colli scalenes
transversis abdominis
o: Ribs VII-XII Thoracolumbar fascia Anterior hip bone i: Linea Alba, Public tubercle
flexor digitorum superficialis
OI/FCT
o: Medial epicondyle , head and proximal 1/3 of radius
i: 4 tendons that split on sides of middle phalanx of digits II-V
fct: Flexion of the wrist, MCP, PIP
what extrinsic muscle of the back is responsible for the elevation of the ribs?
Serratus posterior superior
innervation of latissimus dorsi?
thoracodorsal nerve
C6-C8
what is the innervation of serratus posterior superior?
anterior rami of intercostal nerve T1-T4
what anterior muscles act on the scapulothoracic joint?
pectoralis minor
subclavius
serratus anterior
splenius cervicis OI?
o: SPs of TIII-TVI
i: TPs of CI-CIV
flexor carpi radialis
i and fct?
i: metacrpals 2-3
fct: flexion and R.D. of the hand at the wrist
flexor carpi ulnaris
i and fct?
i: pisiform, hammate and Metacarpal 5
fct: flexion and U.D of the hand at wrist