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Front 1

SCALP

ANTERIOR NERVE

Back 1

A. Anterior nerve: supraorbital nerve@supplies the scalp as far posteriorly as
the vertex

Front 2

SCALP

LATERAL NERVES

Back 2

B. Lateral nerves: auriculotemporal nerve@ascends anterior to the auricle and
supplies the scalp in the temporal region; lesser occipital nerve@ascends
on the side ofthe neck and supplies the scalp posterior to the auricle

Front 3

SCALP

POSTERIOR NERVES

Back 3

C. Posterior nerves: greater occipital nerve@emerges from the trapezius
inferolateral to the external occipital protuberance and ascends to supply
the scalp as far anteriorly as the vertex; third occipital nerve (dorsal ramus
ofthe third cervical spinal nerve)@supplies a small portion ofthe scalp on
the back ofthe neck, near the midline

Front 4

SCALP

ANTERIOR ARTERY

Back 4

A. Anterior artery: supraorbital artery@accompanies the supraorbital nerve

Front 5

SCALP

LATERAL ARTERY

Back 5

B. Lateral artery: superficial temporal artery@accompanies the auriculo-
temporal nerve and divides into an anterior and a posterior branch which
supply the lateral part ofthe scalp

Front 6

SCALP

POSTERIOR ARTERIES

Back 6

C. Posterior arteries: posterior auricular artery@arises from the external
carotid artery posterior to the ramus of the mandible and ascends poste-
rior to the auricle to supply the scalp posterior and superior to the auricle;
occipital artery@arises from the external carotid artery in the neck and
ascends posteriorly across the back of the neck to course with the greater
occipital nerve

Front 7

SCALP

VEINS
LYMPHATICS
CLINICAL NOTE: "surgical flaps"

Back 7

D. Veins: accompany their respective arteries

E. Lymphatics: drain directly or indirectly to deep cervical nodes; in the lat-
ter instance, lymph first passes through either occipital, retroauricular,
superficial parotid, or deep parotid nodes

F. Clinical note: since arteries and nerves ascend into the scalp, surgical flaps
are left attached from below