MUSCLES OF BACK By : Prof. Ahmed Fathalla Dr.Sanaa Alshaarawy.

Slides:



Advertisements
Similar presentations
Muscular Anatomy of the Shoulder
Advertisements

Neck, Trunk, & Pelvis.
Muscle of the back Muscle are arranged in 2 layers:
Lab 4 – 3.2: Shoulder.
External occipital protuberance Ligamentum nuchae
WINDSOR UNIVERSITY SCHOOL OF MEDICINE St.Kitts
Shoulder Girdle KIN 245.
DISSECTION OF THE BACK AND SCAPULAR REGION
Anatomy and Physiology I
The Muscular System Part C
Upper Extremity Musculature
Anatomy and Kinesiology of the Shoulder Girdle
Dissection of the Superficial Part of the Back
Cover slide.
Muscles of the Posterior Trunk
Muscles of back D.Rania Gabr D.Sama. D.Elsherbiny.
The Shoulder Joint TEST MONDAY
Muscles of Back Dr. Sama ul Haque Dr Rania Gabr.
Trapezius: Upper, Middle, and Lower fibers
MUSCLES OF BACK Prof. Ahmed Fathalla Ibrahim Professor of Anatomy
Table 11-7 Anterior Muscles of the Neck (Figure 11–9)
Muscles Martini Chapter 11
Classification of muscles of the trunk
Muscles Martini Chapter 11
Muscles Martini Chapter 11
The Shoulder Complex.
Trapezius (Upper fibers) O: base of skull, occipital protuberance, posterior ligaments of neck I: posterior aspect of lateral 1/3 of clavicle A: elevation.
Muscles of Shoulder Girdle
Glenohumeral Joint Jessica Vila & Carrie A. Hoch.
Muscles of Back Dr. Sama ul Haque.
Muscles of the Pectoral & Shoulder region
Presentor: Angelie Melzer
1 BACK AND SCAPULAR REGION Dr.Lubna Nazli Asst.Prof RAKMHSU Dt.22/10/07.
Lecture One Superficial back.
Muscles of the Back By Prof Saeed A. Abouel Makarem.
1.1 Part II : ANATOMY OF THE SPINE, ABDOMEN AND SHOULDER COMPLEX
By Prof. Saeed Abouel Makarem
Muscles of the chest and abdomen
Myology of the Shoulder
Shoulder Girdle/Joint Lab
PECTORAL REGION AND AXILLA
PECTORAL REGION AND AXILLA By: PROF. Saeed Abuel Makarem DR.SANAA AL-SHAARAWY.
ANATOMY OF THE SHOULDER REGION
Principle Skeletal Muscles 2
PECTORAL , BACK AND SCAPULAR REGION
Musculoskeletal Flash Cards Neck, trunk, & Pelvis
SHOULDER Kaan Yücel M.D., Ph.D 12.March.2014 Wednesday.
Scapular Region Dr. Sama-ul-Haque Dr. Rania Jabr.
Superficial muscles of the back
DEEP BACK MUSCLES. Deep Back Muscles Epaxial muscles. Epaxial muscles. Hypaxial muscles. Hypaxial muscles. Pharyngeal arch muscles. Pharyngeal arch muscles.
The muscles of trunk.
LEC: Anatomy: Upper Extremity I (Revised)
Gross Anatomy 2: Superficial Back Kulesza. Readings: Snell, Clinical Anatomy by Regions (8 th edition) The Superficial Part of the Back and the Scapular.
MUSCLES OF THE CHEST & BACK
Shoulder region Bones Joints Muscles Vessels & Nerves.
Dr. Ahmed Fathalla Ibrahim & Dr. Zeenat Zaidi. OBJECTIVES At the end of the lecture, students should be able to: the different groups of back muscles.
ANATOMY OF THE SHOULDER REGION
Upper Limb Regions Shoulder Arm & Forearm Hand.
+ Posterior muscles of the neck Dr.Muhammad Mustafa yousafzai.
Origin Insertion Nerve Action External Intercostal
Trunk Muscles. Anterior Muscles Name: Pectoralis Major Origin: Sternum, clavicle, & 1 st to 6 th rib Insertion: Proximal humerus Primary action: Adducts.
Upper Limb Regions Shoulder Arm & Forearm Hand.
Trapezius Origin: medial third of superior nuchal line; EOP; ligamentum nuchae, T1-T12 spinous process Insertion: spine of scapula; acromion; lateral third.
Upper limbs & Muscles connecting them to the trunk
Department of Anatomy Wenzhou Medical University Chenyou Sun
Muscles of the shoulder girdle
Muscles of the Spine.
 Muscles Of The Back Editing File.
MUSCLES OF BACK By : Dr.Sanaa Alshaarawy.
MUSCLES OF BACK Prof. Ahmed Fathalla Ibrahim Professor of Anatomy
Presentation transcript:

MUSCLES OF BACK By : Prof. Ahmed Fathalla Dr.Sanaa Alshaarawy

OBJECTIVES At the end of the lecture, students should be able to: Distinguish between the different groups of back muscles. Compare between groups of back muscles as regard their nerve supply and action. List the back muscles of each group. Describe the attachments of each muscle of the superficial group, as well as, its nerve supply and action. Describe the triangles of back and their clinical significance.

BACK MUSCLES They are organized into 3 groups: Intrinsic muscles: Deep group: attached to & involved in the movement of vertebral column & head. Intermediate group: attached to ribs & serve respiratory functions. Superficial group: attached to & involved in the movements of upper limb. Intrinsic muscles: Develop in the back Supplied by posterior rami of spinal nerves Extrinsic muscles: Not developed in the back. Supplied by anterior rami of spinal nerves.

DEEP GROUP OF BACK MUSCLES They extend from sacrum to skull. They include extensors and rotators of head & vertebral column. Their tone is responsible for maintenance of normal curvature of vertebral column. The largest muscle of this group is “erector spinae” which is formed of 3 vertical columns (from lateral to medial: iliocostalis, longissimus & spinalis). (Note the length and attachment of the muscle fibers)

INTERMEDIATE GROUP OF BACK MUSCLES It is separated from the deep group by thoracolumbar fascia. It includes: Serratus posterior superior (rib elevator). Serratus posterior inferior (rib depressor). Nerve supply: anterior rami of thoracic spinal nerves.

SUPRERFICIAL GROUP OF BACK MUSCLES Includes two sets of muscles: Muscles connecting vertebral column to scapula (move scapula through shoulder girdle joints) & include: Trapezius. Levator scapulae. Rhomboid minor. Rhomboid major. Muscle connecting vertebral column to humerus (move humerus through shoulder joint), & include: Latissimus dorsi. 2 1 3 4

TRAPEZIUS Origin: Spines of cervical & thoracic vertebrae Insertion: lateral 1/3 of clavicle + acromion & spine of scapula. Action: rotation of scapula during abduction of humerus above horizontal. Upper fibers: elevate scapula. Middle fibers: retract scapula Lower fibers: depress scapula. Nerve supply: Spinal part of accessory (11th cranial) nerve. Insertion Action Origin

LEVATOR SCAPULAE RHOMBOID MINOR & MAJOR Origin: Levator scapulae: cervical transverse processes Rhomboid minor & major: thoracic spines Insertion: medial border of scapula. Nerve supply: dorsal scapular nerve. Actions: Levator scapulae: elevates scapula. Rhomboid minor & major: retract scapula. Insertion

LATISSIMUS DORSI Origin: spines of thoracic vertebrae. Insertion: bicipital groove of humerus. Nerve supply: thoracodorsal nerve. Actions: extension, adduction & medial rotation of humerus (arm, shoulder joint). Insertion Origin

MUSCULAR TRIANGLES OF BACK Auscultatory Triangle: Boundaries: latissimus dorsi, trapezius, and medial border of scapula. Site where breath sounds are most easily heard with a stethoscope. Lumbar Triangle: (Triangle of Petit) Boundaries : latissimus dorsi, posterior border of external oblique muscle of the abdomen, and iliac crest. Site of an abdominal hernia; or where pus may emerge from the abdominal wall.

SUMMARY BACK MUSCLES: Deep group: attached to & moves vertebral column, supplied by posterior rami of spinal nerves. Intermediate group: attached to & moves ribs, supplied by anterior rami of spinal nerves. Superficial group: - Origin: vertebral column. - Insertion: scapula (EXCEPT latissimus dorsi: humerus). - Action: moves scapula (EXCEPT latissimus dorsi: moves humerus). - Nerve supply: anterior rami of spinal nerves through brachial plexus (EXCEPT trapezius: 11th cranial nerve).

THANK YOU

QUESTION 1 Which one of the following muscles of back that rotates the humerus medially ? Trapezius. Latissimus dorsi. Rhomboid major. Serratus posterior superior.

QUESTION 2 Regarding back muscles, which one of the following statements is correct? All back muscles are supplied by posterior rami of spinal nerves. Muscles of intermediate group move vertebral column. Muscles of superficial group are involved in upper limb movements. Muscles of deep group serve respiratory functions.

Which one of the following muscles is involved in movement of upper limb ? Serratus posterior superior. Serratus posterior inferior. Erector spinae. Trapezius. Which one of the following muscles connects the vertebral column to humerus? Levator scapulae. Latissimus dorsi. Rhomboid major. Which one of the following muscles contributes in the boundaries of muscular triangle of back?