The Muscular System 1 - bpumsmed.bpums.ac.ir/.../CourseFiles/The_Muscular_System_1__07c88306.pdf ·...

The Muscular System 1The Muscular System 1

Dr. AlmasiAutumn 1388

Muscles of the faceMuscles of the face

• Occipitofrontalis• Orbicularis oculi • Buccinator • Orbicularis oris

M• Masseter• Temporalis• Pterygoid muscle


ActionNerve supplyInsertionOriginMuscle

Raises the eybrowFacialOccipitofrontalis

Close the eyeFacialOrbicularis Occuli

Chewing, expulsion of airFacialBuccinator

Clase the lips, whistelingFacialOrbicularis Oris

Draw mandible upTrigeminalAngle of mandibleZygomatic archMasseter

Close the mouthTrigeminalMandibleTemporalTemporalis TrigeminalMandibleTemporalTemporalis

Close the mouth, pulls lower jaw forwardTrigeminalMandibleSphenoidPterygoid


Muscles of the neckMuscles of the neck

• PlatysmaPlatysma• SternoCleidoMastoid muscle (SCM)• Tr p zi m l• Trapezius muscle


ActionNerve supplyInsertionOriginMuscl

e

Turning the head, contraction on one side draw the head towards the shoulder, on AccessoT lSt Cl i lSCM g , ,both sides flex the cervical vertebraeryTemporalSternum, ClavicleSCM

Pull the head backward, control the movement of the scapula when shoulder joint is in use

Accessory

Clavicle, Scapula

Occipital, cervical and thoracic vert.

Trapezius


Muscles of the backMuscles of the back

• TrapeziusTrapezius• Latissimus dorsi• S r pin li• Sacrospinalis• Quadratus lumborum• Psoas• Teres Major



Trapezius

Extension Adduction armBrachial PlxHumerusScapulaTres major Extension, Adduction armBrachial Plx.HumerusScapulaTres major

Psoas

Fix the 12th rib during resp, Ext. vert., Lat. flexionLumbar Plx.12th ribIliac crestQuadratus Lumb.

Extension Vert. columnLumbar Plx.OccipitalSacrumSacrospinalis

Add., med. Rotation, Ext. armBrachial Plx.HumerusIliac crest, lumbar and lower thoracic Vert.Latissimus dorsi


Muscles of the thoracic wallMuscles of the thoracic wall

Anterior and lateral part (Pectoral region)Anterior and lateral part (Pectoral region)• Pectoralis Major• Pectoralis Minor• Subclavius• Serratus Anterior


Muscles of the abdominal wallMuscles of the abdominal wall

Anterior and lateral partsAnterior and lateral parts• Rectus abdominis• External oblique• Internal oblique• Transversus abdominis



T6-T12Lower ribs, Sternum, Linea albaPubisRectus

abd.

Compress the Abd. Organ, flex the vert. column, one side bend that ward, contraction obliques rotate the trunk

T7-T12Iliac crest, linea albaLower ribsExt. Oblique

T7-L1Lower ribs, linea alba

Iliac crest, lumb. Vert.

Int. Oblique

T7-L1Linea albaIliac crest, lumb. Vert.

Transversus abd.


Muscles of the abdominal wallMuscles of the abdominal wall

Posterior abdominal wallPosterior abdominal wall• Quadratus lumborum• Psoas • Internal oblique• Transverses abdominis


Muscles of the pelvic floorMuscles of the pelvic floor

Pelvic DiaphragmPelvic Diaphragm• Levator ani• Coccygeus



support pelvic organ maintaining continence of the bladder and

S4, pudendal nerveCoccyx

Pubis. ilium

Levator ani support pelvic organ, maintaining continence of the bladder and

the rectumCoccyx, midline

S4, S5ischiumCoccygeus


Muscles of respirationMuscles of respiration

Intercostal musclesIntercostal muscles• External intercostals

I l i l• Internal intercostals

• Diaphragm



1st rib is fixed. Contraction leads other ribs toward 1st rib.Intercostal nerveLower ribUpper ribExt. int

Int. int

C t ti l d t d t ll d d dPhrenic C t l t dL ib t V t lDi h Contraction leads tendon to pulled downward (cervical Plx)Central tendonLower rib, sternum, Vert. columnDiaphragm


The Muscular System 1 - bpumsmed.bpums.ac.ir/.../CourseFiles/The_Muscular_System_1__07c88306.pdf ·...

Documents

Transcript of The Muscular System 1 - bpumsmed.bpums.ac.ir/.../CourseFiles/The_Muscular_System_1__07c88306.pdf ·...