Test 2 samsam muscles

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Terms in this set (131)
Serratus Anterior MFxn: Elevation of the arm over 90 protracts the scapula and holds it against the thoracic wall and rotates the scapula laterally to elevate the arm Innervation: Long thoracic N C5 C6 C7 Dorsal Muscle GroupSubclavious MFxn: pulls the clavicle towards the sternum Innervation: Nerve to the Subclavious C5-C6 Ventral Muscle groupBiceps Long headFxn: Abductor and medial rotator of the arm Innervation: Musculocutaneous N C5-C6Biceps Short headFxn: Adductor of the arm Innervation: Musculocutaneous N C5-C6both heads of biceps?Fxn : Flex (anteroversion) shoulder joint on elbow joint: Flexor and strong supinator of the forearm Innervation: Musculocutaneous N C5-C6BrachialisFxn: Powerful flexor of the elbow joint Innervation : Musculocutaneous N C5-C6 , and radial nerve to some of its lateral partsTriceps M all3 heads Fxn: chief Extensor of the elbow joint Innervation : Radial N C6 C7 C8Triceps M Long headActs on two joints, Retroversion(extension) , and adduction of the arm Innervation : Radial N C6 C7 C8Anconeus MFxn: assists the triceps in extension of the elbow Innervation: Radial Npalmaris longusFxn: flexes the hand towards the palm, and tenses the palmar aponeurosis NN : median N C7-T1Pronator TeresFxn : Pronation of the forearm and flexion at the elbow NN: Median NFlexor Carpi radialisFxn: Palmar flexion and radial abduction of the hand NN: Median N C6-C7Flexor Digitorum SuperficialisFxn : Strong flexors of the finger ( 4 medial) joints, also flexes the wrist, and runs in the carpal tunnel NN: Median N C7 C8 T1Flexor carpi UlnarisFxn : Hand ( palmar) flexion and adduction runs outside of the carpal tunnel NN: Ulnar N C7-C8flexor digitorum profundusruns through carpal runnel Fxn: Flexor of the wrist NN : Median N ( ant interosseous) branch laterally C8 and T1, and Ulnar medially C8 - T1Flexor Pollicis longusRuns through carpal Tunnel has its own tendon sheath Fxn : Flexor of the terminal phalanx ( thumb) NN: Median N (ant Interosseous branch) C8-T1Pronator QuadratusFxn: Protenates the forearm (with pronator teres) NN: Median N (ant. interosseous branch) C8-T1Brachioradialisbeer drinking muscle Fxn: brings the forearm into the midposition between pronation and supination, in this position it acts as a flexor (forearm flexor) NN: Radial N C5 C6 C7Extensor Carpi radialis longusFxn: Extensor and abductor of hand at the wrist joint NN: Radial N C6 C7Extensor Carpi Radialis BrevisFxn: Extensor and abductor of the hand at the wrist joint NN : radial N Deep branch C7, C8Extensor digitorumRuns in 4th tendon compartment produces the dorsal aponeurosis with interteninous connections Fxn: Extends the 4 medial fingers ( metacarpophalangeal J) strong doriflexor of the hand at the wrist joint NN: Post interosseous branch of deep radial Nerve C7 C8extensor digiti minimiruns in the 5th tendon compartment Fxn: Extension of the 5th digit and dorsiflexion of hand NN: post interosseous branch of deep raidal Nerve C7 C8Extensor carpi ulnarisRuns in 6th tendon compartment Fxn: extends and adducts the hands NN: Post interosseous branch of deep radial nerve C7 C8SupinatorFxn : encircle the radius and supinate forearm NN: Deep branch of radial N C5-C6Abductor Pollicis longusFxn: abduction of first thumb its extension at carpometacarpal joint NN: Posterior interoosseous branch of deep radial Nerve C7 C8Extensor pollicis brevisRuns in the 1st tendon compartment Fxn: extension of the proximal phalax at metacarpophalangeal joint NN: Posterior interoosseous branch of deep radial Nerve C7 C8Extensor pollicis longusruns in 3rd tendon compartment Fxn: extends the thumb using the crest on the radius as a fulcrum ( at the metacarpophalangeal and interphalangeal) joints NN: Posterior interoosseous branch of deep radial Nerve C7 C8extensor Indicisruns through the 4th compartment with ext digitorum Fxn: index extension and hand dorsi flexion NN: Posterior interoosseous branch of deep radial Nerve C7 C8Abductor polloicis brevisFxn: Abduction of the thumb NN: median N C8-T1Flexor Pollicis brevis superficialFxn: Flexes the thumb NN: Median N C8-T1Adductor pollicis Transverse headFxn: Thumb Adduction NN: Deep branch of ulnar nerve C8-T1Adductor pollicis oblique headFxn: Thumb adduction NN: Deep branch of ulnar nerve C8-T1opponens pollicisFxn: Thumb opposition NN: Median N C8-T1Flexor Pollicis brevis deep headFxn : Flexes the thumb NN: Ulnar N C8-T1 (not in moore)Palmar AponeurosisConsists of the longitudinal and transverse fascicles merges with the flexor retinaculum Fxn : Partial flexion of the ring and small finger if undergoes dupuytrens contracturePalmar Brevisin hypothenar eminence Fxn: Connects the skin of the ulnar border to the palmar aponeurosis and flexor retinaculum NN: Superficial branch of the Ulnar N C8-T1Abductor digit minimiFxn : abducts the 5th digit NN: Deep branch of the ulnar N C8-T1Flexor digiti minimiFxn : flexes the 5th digit NN: Deep branch of the ulnar N C8-T1Opponens digiti minimiFxn : opposition of the 5th finger to thumb possible NN: Deep branch of the ulnar N C8-T1interossei musclesPalmar interosseous, 3 sigle-headed Dorsal interosseous, 4 double-headedPalmar Interossei3 muscles Fxn : Adduction of digits assist lumbircals NN: Ulnar N. Deep branch C8-T1Dorsal Interossei4 muscles Fxn : Abduction of digits NN : ulnar nerve deep branch C8-T1Lumbricals4 muscles 2 medial - ulnar N c8 - t1 2 lateral - median N c8-T1skin of the palmar regioncutaneous branches of the median and ulnar nerveswhat does the opthalmic nerve innervate?area above the orbit and the superolateral aspect of the nosewhat innervates the infraorbital region?the maxillary nervewhat innervates the mandible as well as the area below the lateral to the oral regionmandibular branch of the trigeminal nervewhat innervates the skin of the scalp, and below the earc2 - greater occipital nervewhat innervates the lateral aspect of the upper neck in the retromandibular region and continues in front over the thyroid areac3 - third occipital nervewhat nerves innervate the posterior lateral and anterior aspect of the neck?c4-c6what are the superficial muscles of the face - facial expression muscles innervated by, and what innervates the deeper muscles?facial nerve deeper = trigeminal nervemasticatory muscles are innervated by thetrigeminal nervesternocleidomastiod, and trapezious are innervated by theaccessory nervewhat innervates the infrahyoid muscles of the deeper layer of the on the anterior aspect of the neckcervical plexus and cervical ansawhat are the suprahyoid muscles supplied by?branches of CN 5 and 7 as well as the cervical nervesoccipitofrontalis2 bellies frontal and occipital Fxn :frontal = raises eyebrow - displacement of falea aponeurotica =draws the scalp forward = transverseal wrinkling of the forehead - astonishment Occipital = drawing back the galea aponeurotica, may aid in raising eyebrow too, smiling and yawning , active during movements of the auricleorbicularis oculi3 parts orbital/ outer, palpebral - covers eyelid, lacrimal - close to lacrimal bone Fxn: Orbital = closes eye tightly palpebral - closes eye lightly lacrimal - pulls eyelid medially = help expell tears from lacrimal sac contraction of the orbicular occuli = wrinkles and golds int eh lateral angle of the eye = concern and worry - crows feet NN: Cn7corrugator supercillivertical folds = protect against light = thinkers brow expression, contraction brings the skin and eyebrow down medially protecting from sun pathetic pain muscle NN : CN7proceruswrinkles the skin of the bridge of the nosenasalisrespiration, transverse part compresses nostril and the ala dilutes the nostril - desire demand and sensuousnesslevator labii superioris alaeque nasiLLSAN elevates the upper lip and the nasal wing that opens the nostrils - expression of displeasureLEvator lavii superiorisLLS? upper lip i think raises NN CN7Zygomatic minoraids in the fucntion fot he zygomaticus major and its contraction deepends the nasolabial groove NN CN7Zygomatic majorelevates the angle of the mouth up while smiling and laughing NN Cn7levator anguli orishelps elevate the angle of the mouth self confidence NN CN7Orbularis oris musclehelps in eating and drinking, its contraction closes the lips with its strong contractions aiding in sucking NN CN7risoriusaids in laughing, produces nasolabial folds, contraction gives expression of action NN Cn7buccinatorlateral wall of the oral cavity pulls the angle of the mouth laterally/up? , compresses cheeks, and helps hold in food between teeth while chewing blowing air out of the mouth keeps the mucous membrane free of folds contraction = satisfication NN CN7Depressor anguli orispulls the angle of the mouth down = sadness NN Cn7depressor labii inferioriscontraction brings the lower lip down perserverence NN Cn7mentallisits contraction = wrinkles of the chin aid in pushing up the lower lip chin lip furrow NN CN7platysmacontraction = depresses angle of the mouth NN CN7Muscles of mastication are innervated by?Mandibular Nerve Cn 5/3, develope from 1st brachial arch MAssester M Temporalis M Lateral and medial PterygoidMasseter Mpowerfully closes the jaw by elevating the mandible NN Masseteric N Cn 5/3Temporalis MStrongest elevator of the lower jaw NN: Deep temporal N CN 5/3LAteral PterygoidMandibular movements - guiding muscle NN: Lateral ptrygoid N CN 5/3Medial Pterygoid MElevates mandible and pushes it forward - rotational movement NN: medial Pterygoid N CN 5/3sternocleidomastoidc2-c3 most superficial muscle in the anterolateral aspect of the neck, beneath the platsma unilateral conractions turns the head to the opposite side and bends it ipsilaterally while bilateral contraction lifts the head , aids in respiration by elevating the upper part of the thorax nn: accessory nerve - spinal root of cn 11, and C2-c3 for proinception and paintrapezius3 parts superiro fibers - descending, middle fibers = transverse, and inferior fibers = ascending supports the scapular and shoulder, elevates the arm, rotate and adduct arm aswell NN: CN 11 -motor , CN 3-4 sensory innervation and proprioception and paincervical Plexusconsists of c1-c4 skin and several muscles of the neck are innervated by thisdigastricanterior and posterior belly raising the hyoid bone and stabalizing it during speaking and swallowing, brings down the mandible NN anterior belly is innervated by the nerve to the mylohyoid by a branch of the mandibular nerve Posterior belly is NN by facial nerve CN 7stylohyoid muscleelevates and retracts the hyid bone, elongates the floor of the mouth NN: cervical branch of the facial N CN 7mylohyoidelevates the hyoid and floor of the mouth and tounge during swallowing and speaking NN: mylohyoid nerve, from the inferiro alveolar branch of the mandibular Ngeniohyoid musclepulls the hyoid bone anterosuperiorly, shortens the floor of the mouth and widens the pharynx NN: C1 via the hypoglossal nerveomohyoid muscledepresses the hyoid, opens the mouth and helps in the lateral flexion of the head, it is a fascia tensor and dialates the internal jugular vein lying beneath it, which helps the return of blood to the heart NN C1-C3 of cervical plexussternohyoiddepresses the hyoid, opens the mouth and helps in the lateral flexion of the head, it is a fascia tensor and dialates the internal jugular vein lying beneath it, which helps the return of blood to the heart NN C1-C3 of cervical plexusSternothyroiddepresses the hyoid, opens the mouth and helps in the lateral flexion of the head, it is a fascia tensor and dialates the internal jugular vein lying beneath it, which helps the return of blood to the heart NN C1-C3 of cervical plexusThrohyoiddepresses the hyoid, opens the mouth and helps in the lateral flexion of the head, it is a fascia tensor and dialates the internal jugular vein lying beneath it, which helps the return of blood to the heart NN C1-C3 of cervical plexusrectus capitis anteriorhead flexion NN: c1longus capitishead flexion and turning the head NN: c1-c4longus colliflexion of the cervical spine , NN : C1-C8 nscalene muscles3 in the neck and upper part of the thorax assist in respiration and movement of the thoracic cage by elevating the ribs , can also bend the neck NN: Brachial plexus and the cervical plexus, cervical only does the posterior scalenesensory innervation of the forehead and face?CN V 1 2 3 CN v = trigeeminal V1 = opthalmic V2 = Maxillary V3 = Mandibularwhat innervates the skin of the occipital region?C2 C3innervation of the suboccipital triangle?C1inenrvation of the back of the neck?C3-C7CN V2terminal branches of the maxillary Nerve - infraorbiral zygomaticofacial and zygomaticotemporal nerves are responsible for innervating the skin of the infraorbital buccal lateral nasal and superior labial rehionsCNv1opthalmic N dorsum of the noseskin of the lower lip, mental area?mental N, branch of V3 - vandibular nerveparatoid region innervated byauriculotemporal nerve - coming from V3lower row of teeth?inferior alveolar nerve, its inferior branch comes out of the mental foramenintrinsic muscles of the tongue?hypoglossal N CN12parasympathetic NN of the submandibular and sublinguinal glandsganglionic branches of the linginal nervewhat NN the carotid sinusthe vagus and the sympathetic plexusTrigeminal V nerveOphthalmic (V/1), Maxillary (V/2) and mandibular (V/3) nerves. Ophthalmic nerve: supplies the forehead: Supratrochlear N and supraorbital .MAxillary Nervesupplies lower eyelid, Cheek, lateral nasal, upper lip and anterior Temporal regions by Infraorbital N.MAndibularlower lip over mandible (not angle) and chin by mental N. Auriculotemporal N supplies skin on Mandible ramus, concha of auricle and Most part of ext. layer of tympanic memb.platysma 2 - slides nowIs the only cutaneous muscle in human body (under the skin) Fxn: *Action: brings down corners of the mouth, expressing sadness *Innervation: Facial N. (VII) (cervical branch)TrapeziusFxn : elevation/retraction/ rotation of the scapula - helps in adduction and slight elevation of the armSternocleidomastoid MFxn : - unilateral contraction , turns the head to opposite sides and bends it ipsilaterally - bilateral contraction - lifts the head also functions in respiration! NN: Accessory nerve CN( and C2-C3Omohyoid,*Action: fascia tensor and dilates internal Jugular vein lying beneath it. (this aids to return of blood to the heart) Opens the mouth and helps in lateral flexion of the head. *Innervation: Most Infrahyoid muscles are innervated by cervical Ansa (C1-C3).Digastric muscleFunction: Raising hyoid and stabilizing it in speaking and swallowing,depressing the mandible. **Innervation: Ant. Belly: V/3, trigeminal N. (from nerve to myelohyoid) and post. belly: VII, facialStylohyoid M.:Function: elevates and retracts hyoid bone, elongates floor of the mouth. Innervation: VII, facial N. (cervical branch)*Myelohyoid M.:Function: Elevates hyoid and floor of the mouth and tongue in swallowing and speaking. *Innervation: V/3 (myelohyoid N. from inf. Alveolar N.)Geniohyoid M.:Function: pulls the hyoid anterosuperiorly, shortens floor of the mouth and widens pharynx. *Innervation: C1 via hypoglossal nerveParavertebrals:Rectus Capitis Ant., Logus Capitis and Longus Colli.Rectus capitis:Helps to flex the head. NN: Cervical Plex.(C1)Longus Capitis:Bend the head forward and unilateral action turns the head sideways. NN: Cervical Plexus(C1-4)Longus Colli:Action: unilateral contraction bends and turns cervical column to the side. Also bend the cervical spine forwards. NN: cervical and brachial Pl. (C2-C8)Scalene musclescalene muscles Most important muscles for quiet inspiration They lift the first 2 pairs of ribs (sup part of thorax). Unilateral contraction tilts cervical column to one side. Scalene Anterior: Scalene Medius: Scalene Posterior : NN: Brachial plexus (C4-C8). Scalenus minimus M. may be present in 30%. Scalene opening: brachial plexus and subclavian artery pass through.Thyroid glandBody's largest endocrine gland Is deep to sternothyroid and sternohyoid M At C5-T1 level. It has a capsule and externally covered by a sheath. Consists of an isthmus, which unites the lobes. A right lobe and a left lobe. Pyramidal lobe: A remnant of thyroglossal duct may persist in the middle part of thyroid (50%). Ectopic Thyroid ****Function: Produces Thyroxin which controls the rate of metabolism of the body, and Calcitonin controlling Ca++ metabolism. Blood supply: Superior and inferior thyroidal artery