Muscles

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229 Terms
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epicranius location

forehead

<p>forehead</p>
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epicranius bony attachment

cranial aponeurosis

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epicranius soft tissue attachment

skin on forehead

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epicranius function

wrinkles forehead and moves scalp, elevates eyebrows

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orbicularis oculi location

around the eye

<p>around the eye</p>
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orbicularis oculi bony attachment

margin of the orbit of eye

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orbicularis oculi function

closes eye

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orbicularis oculi soft tissue attachment

skin around eyelids

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.zygomaticus location

cheekbones to corners of mouth

<p>cheekbones to corners of mouth</p>
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zygomaticus bony attachment

zygomatic bone

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zygomaticus soft tissue attachment

skin around mouth

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zygomaticus function

elevates corners of mouth and lips (smile)

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orbicularis oris location

surrounds mouth

<p>surrounds mouth</p>
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orbicularis oris bony attachment

maxilla and mandible

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orbicularis oris soft tissue attachment

skin around lips

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orbicularis oris function

purses and protrudes lips (kissing, puckering)

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platysma location

front of neck, cheek to under collarbones, superficial

<p>front of neck, cheek to under collarbones, superficial</p>
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platysma bony attachment

fascia of upper thorax and lower neck

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platysma soft tissue attachment

skin of cheek and mandible

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platysma function

depresses lower lip, tenses skin of neck

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temporalis location

temporal bone

<p>temporal bone</p>
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temporalis superior attachment

temporal bone

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temporalis inferior attachment

coronoid process of mandible

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temporalis function

elevates and retracts mandible

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masseter location

covers lateral portion of jaw

<p>covers lateral portion of jaw</p>
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masseter superior attachment

zygomatic arch

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masseter inferior attachment

ramus of mandible

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masseter function

elevates and protracts mandible

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Sternocleidomastoid location

diagonally across neck from sternum to clavicle, deep to platysma

<p>diagonally across neck from sternum to clavicle, deep to platysma</p>
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sternocleidomastoid superior attachment

mastoid process of temporal bone

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sternocleidomastoid inferior attachment

sternum and clavicle

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sternocleidomastoid function

alone: laterally rotates neck to opposite side

together: flexes neck

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external intercostals location

between ribs; fibers run inferiorly and anteriorly

<p>between ribs; fibers run inferiorly and anteriorly</p>
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external intercostals superior attachment

ribs

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external intercostals inferior attachment

ribs

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external intercostals function

elevates ribs during inspiration

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internal intercostals location

between ribs, deep to external intercostals, run in opposite direction

<p>between ribs, deep to external intercostals, run in opposite direction</p>
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internal intercostals superior attachment

ribs

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internal intercostals inferior attachment

ribs

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internal intercostals function

depresses ribs during expiration

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diaphragm location

large dome shaped muscle that divides the thoracic and abdominopelvic cavities

<p>large dome shaped muscle that divides the thoracic and abdominopelvic cavities</p>
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diaphragm superior attachment

central tendon

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diaphragm inferior attachment

lumbar vertebrae, cartilage of ribs 7-12, xiphoid process

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diaphragm function

primary driver of inspiration

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rectus abdominus location

central on abdomen

<p>central on abdomen</p>
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rectus abdominus superior attachment

xiphoid process and 5th-7th costal cartilages

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rectus abdominus inferior attachment

pubic symphysis and pubic crest

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rectus abdominus function

compression of abdomen, flexion and rotation of trunk

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external oblique location

superficial lateral muscle, fibers running medially on an angle

<p>superficial lateral muscle, fibers running medially on an angle</p>
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external oblique superior attachment

anterior surface of inferior 8 ribs

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external oblique inferior attachment

linea alba and iliac crest

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external oblique function

compression of abdomen

alone: rotation of trunk

together: flexion of trunk

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internal oblique location

deep to external oblique; fibers run in opposite orientation

<p>deep to external oblique; fibers run in opposite orientation</p>
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internal oblique superior attachment

iliac crest, inguinal ligament

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internal oblique inferior attachment

iliac crest, linea alba, ribs

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internal oblique function

compression of abdomen

alone: rotation of trunk

together: flexion of trunk

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transversus abdominis location

deep to internal oblique, fibers run in a transverse plane

<p>deep to internal oblique, fibers run in a transverse plane</p>
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transversus abdominis superior attachment

iliac crest, inguinal ligament, cartilages of ribs

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transversus abdominis inferior attachment

linea alba and pubic crest

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transversus abdominis function

compresses abdomen

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rectus sheath

CT sheath surrounding rectus abdominis, formed from aponeuroses of external and internal oblique and transverse abdominis muscles

<p>CT sheath surrounding rectus abdominis, formed from aponeuroses of external and internal oblique and transverse abdominis muscles</p>
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linea alba

tendinous structures that serves as an insertion point for external and internal oblique and transversus abdominis muscles

<p>tendinous structures that serves as an insertion point for external and internal oblique and transversus abdominis muscles</p>
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Serratus anterior location

lateral portion of thoracic wall

<p>lateral portion of thoracic wall</p>
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serratus anterior proximal attachment

ribs 1-8

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serratus anterior distal attachment

medial border of scapula

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serratus anterior function

protracts scapula, rotates scapula anteriorly, holds scapula against rib cage

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pectoralis minor location

deep to pectoralis major

<p>deep to pectoralis major</p>
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pectoralis minor proximal attachment

ribs 3-5

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pectoralis minor distal attachment

coracoid process of scapula

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pectoralis minor function

protracts and depresses scapula, elevates ribcage, flexed, adducts, medially rotates arm

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trapezius location

diamond shaped muscle on superior portion of back (superficial)

<p>diamond shaped muscle on superior portion of back (superficial)</p>
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Trapezius proximal attachment

occipital bone, spinous process of C7-T12

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Trapezius Distal Attachment

clavicle; acromial process and spine of scapula

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trapezius function

elevates and rotates, retracts and depresses scapula

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rhomboids location

deep to trapezius

<p>deep to trapezius</p>
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Rhomboids proximal attachment

spinous process of C7-T5

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Rhomboids distal attachment

medial border of scapula

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rhomboids function

retracts, elevates, adducts and stabilizes scapula

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pectoralis major location

upper thorax

<p>upper thorax</p>
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pectoralis major proximal attachment

sternum, medial clavicle, costal cartilage of ribs 2-6

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pectoralis major distal attachment

intertubercular groove of humerus

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pectoralis major function

flexes, adducts, medially rotates arm

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deltoid location

superior muscle of shoulder

<p>superior muscle of shoulder</p>
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Deltoid proximal attachment

clavicle, acromion, spine of scapula

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