Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University 1 Systematic Anatomy Locomotor system - Part 5 Introduction of myology The muscles of head, neck and trunk Dr.& Prof. Hongqi Zhang (张红旗) Dept.of anatomy & histoembryology Email: [email protected]
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Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University1
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Muscles of facial Expression lateral view
Facial muscles
Epicranial muscleOccipitofrontal muscle1-Frontal belly5-Occipital belly2-Epicranial aponeurosisMuscle around the eye3-Orbicularis oculiMuscle around the eye4-orbicularis oris
6 Nasal muscle
15
2
3
4
6
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Masticatory muscle
1-Temporal muscle
2-Masseter
3-Laternal pterygoid m.
4-Medial pterygoid m.
1
2
3
4
3
4
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Function Open and close the mouthMandibular joints move laterallySide-to-side
1-Lat. pterygoid m.
2-Med.pterygoid m.
1
2
2
1
2
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Muscles of the neck
Muscles of the neck
Superficial
Anterior cervical m
Deep
Platysma m.
Sternocleidomastoid m.
Suprahyoid mm.
Infrahyoid mm.
Lateral group
Medial group
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Platysma
Skin muscle
Arise from the deep fascia over the pectoralis major and detoid and inserted intothe skin of the lower part of the face.
ActionTense the skin of neckDraws corners of mouth downAssists in depressing mandible
Both platysma contract
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Muscle of neck lateral view
Sternocleidomastoid m.
Superficial muscles of the neck
Name from origin and insertionA prominent visible landmarkAction- Acting alone: The head is inclined laterally & the face rotateto the opposite sideActing together- they draw thehead backward or raise the head
Both mm. contract One m. contracts
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
1-Digastric m.2-Stylohyoid m.3-Mylohyoid m.4-Geniohyoid m.
Suprahyoid muscle - 4
3 4Pull the hyoid upward, backward & help to Depress the mandible when the hyoid is fixed
Post.view
1
2
3
1
2
3
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Infrahyoid muscle
Superficial layer
1-Sternohyoid m.2-Omohyoid m.Deep layer
3-Sternothyroid m.4-Thyrohyoid m. 1
2
32
4
Action1-Depresses the hyoid bone as it contracts2-Larynx is pulled downward3-Elevates the larynx and lowers the hyoid bone4-it acts to depress the hyoid bone
Length of muscle 1= m 3 + m 42
2
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Action Elevate the 1st &2nd ribs & help toinspiration
Ant.view of cervical muscles
13
2
Ant.view Lat.view
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Scalene fissure
Between scalenus ant. & mid. subclavian a. & brachial plexus pass from the fissure
Scalenus ant.
Scalenus mid.
Brachial n.
Subclavicular a.
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Muscle of the trunk
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Muscles of the trunk
Back m.Thorax m.Abdomen m.
DiaphragmPerineal m.
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Superficial muscle1-Trapezius muscle2-Latissimus dorsiDeep muscle3-Levator scapulae4-Rhomboid muscleMovement of the limb
Deep muscleErector spinaeMovement of Vertebral column
Muscles of back
1
2
3
4
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Trapezius
Latissimus dorsi
Superficial muscle of backLarge triangular in neck and backOrigin: ext. occipital protuberanceSpine of 1st -7th cervical vertebraSpine of 1st -12th vertebraeInsertionThe lat. 1/3 of the clavicleThe acromion and spine of scapulaAction: raises, descends, retracts & rotates The scapula & extends the head
Large wide & triangular flat m.in the backOrigin:Spinous process of lower six thoracic C.Thoracolumbar fascia, spinous process ofLumbar vertebrae, iliac crestInsertion Crest of lesser tuberosity of the humerusAction: extends, adducts and medially rotates humerus at shoulder joint
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Superficial muscle of backLevator scapulae
Rhomboideus
Levator scapulaeA strap like muscleOrigin: spine of 1st-4th cervical vertebraeInsertion: internal border of scapula
Rhomboideus like a rhomboid shapeOrigin: spine of C7 & T1-6
Insertion: internal border of scapula
Action:The levator scapulae elevates the scapulaIt may also retract and fix the scapula withthe romboideus
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Deep muscle of backErector
spinae
It is a collecting name (groups)Origin: Sacrum, ilium & related ligs.Insertion: Ribs and vertebraeAction:When acting on one side it Bends and rotates the spinal Column toward the opposite side.when acting on Both sides It extends the spinal column.
Erector spinae
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Extrinsic m.(origin in thoracic wall,
Insertion in upper limb bone)
Pectoralis major
Pectoralis minor
Serratus anterior
Intrinsic m.(both origin and insertion are in thoracic wall)
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Large thick fan-shapedOrigin: The medial half of the clavicleThe sternumThe upper 6 costal cartilagesAponeurosis of obliquus externus abdominisInsertion: Crest of greater tuberosity of humerusAction: Adduction, flexion & med. rotation of the arm.When arm is fixed, draws the body upward.
Muscles of thorax- Pectoralis major
Detoid
Pectoralismajor
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Pectoralis minor- small flat triangular m.Origin: External surface of 3-5th ribsInsertion: Cocacoid process of scapulaAction: Stablizes scapula by drawing it forward & downward. when the scapula is fixed, it helps the inspiration.it is also useful landmark (axilla)
Muscles of thorax- Pectoralis minor
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Muscles of thorax- Serratus anterior
A large thin powerful in lateral part of thoraxOrigin: external surface of upper 8 or 9 ribsInsertion: internal border of the scapulaAction: Holds the scapula against the thoracic wall, Pulls the scapula forwards in throwing & pushing by fixing the scapula it helps the inspiration
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
External intercostal m.Help to inspirationInternal intercostal m.Help to expiration
Puncture of thoracic wall
12
3
4
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
External & internal intercostal m.
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Transverse thoracis
Posterior view of ant. thoracic wall1. Locate on the int. surface of ant. thoracic wall2. Originate from lower part of sternum3. Insert to int. surface of 2-6 rib4. Function: to help to expiration
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Diaphragm
1. The dome-shaped septum
2. Dividing thoracic cavity and abdominal one
3. The muscular fiber is around the centrol tendon
4. Sternal part costal part and lumbar part,
5. Three opening (hole)
6. Vena caval foramen
7. Aortic hiatus
8. Esophageal hiatus
9. Important respiratory muscle
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
1-Vena caval foramen (T8)
2-Esophageal hiatus (T10)
3-Aortic hiatus (T12)
Diaphragm
1
1
2
2
3
3
Superior view Anterior view
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Aorta
Phrenic nerve Inf.vena vava Esophagus
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Master the shape, classification and
nomenclature of muscles.
Master the accessory structures of muscle
Master name, location and function of the
masticatory muscle.
Master the insertion, origin and function of
the stenocledomastoid & infrahyoid musclesMaster the distribution & function of
thoracic m. and back muscles.
The important contents today
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University
Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University